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Ordinary Satellite Ground Stations cost millions. We will build one for 20 dollars for the newly launched LoRa satellite. Let’s build it in parallel to the launch of the Electron spacecraft from Rocket Lab. Will it be successful? In my last video, I announced that the 16-year old Julian Fernandez and a small team built FossaSat-1. We will accompany the launch and in parallel, we will build a Ground Station and test it with the real satellite. Will it work?
I am a proud Patreon of GreatScott!, Electroboom, Electronoobs, EEVblog, and others.
My HAM radio channel: / @hb9bla
Links:
Fossa Systems: fossa.systems/
Donations here (for the next one): www.gofundme.com/f/fossasat1-...
Ground Station Software: github.com/G4lile0/ESP32-OLED...
TLE File: drive.google.com/file/d/1g0GW...
Sensor Software (experimental): github.com/G4lile0/FossaSaT_S...
Gpredict Download: gpredict.oz9aec.net/download.php
Join Telegram group: t.me/joinchat/DmYSElZahiJGwHX...
Get MQTT credentials after test phase): forms.gle/3Mm74mGdGxvQyJC9A
Map of stations: fossa.apaluba.com/worldmap/
Discord Channel for support: / discord
For the moment, the TTGO boards seem not be supported by the satellite. Better use an ESP32 and this board: s.click.aliexpress.com/e/kRL6uyYY
TTGO 433MHz board: s.click.aliexpress.com/e/4nF6NXM8 or bit.ly/2RzzTSZ
RFM95 433MHz: s.click.aliexpress.com/e/F2BMWYSM
#CommissionsEarned: The links above usually are affiliate links which support the channel (no additional cost for you).
I am a proud Patreon of GreatScott!, Electroboom, Electronoobs, EEVblog, and others.
Supporting Material and Blog Page: www.sensorsiot.org
Github: www.github.com/sensorsiot
My Patreon Page: / andreasspiess
My Bitcoin address: 19FSmqbBzb5zsYB1d8Bq4KbxVmezToDNTV
If you want to support the channel, please use the links below to start your shopping. No additional charges for you, but I get a commission (of your purchases the next 24 hours) to buy new stuff for the channel
For Banggood bit.ly/2jAQEf4
For AliExpress: bit.ly/2B0yTLL
For ebay.com: ebay.to/2DuYXBp
profile.php?...
/ spiessa
www.instructables.com/member/...
Please do not try to Email me or invite me on LinkedIn. These communication channels are reserved for my primary job

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7 дек 2019

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Комментарии : 471

@AndreasSpiess 4 года назад

The satellite currently is not working properly and cannot be reached with small antennas. Also the TTGO board shown in this video currently seems not be supported. Look at the alternative in the description or follow the Telegram stream.

@DIYJase 4 года назад

Andreas Spiess thanks for you videos on this fantastic project. How great that fossa achieved this. I would love to be involved in something like this. Andreas perhaps you might lead a community project? I would be happy to get involved. Cheers

@MuertoChango 3 года назад

If you are using it legally... as a HAM operator... you can use up to 100s of times the transmit power...

@shashibhushan5418 3 года назад

Dear Andreas Spiess sir I am really a fan of yours but if you don't mind the way you installed the antenna at (12:12) in video you will never going to receive any signal from space due to polarization issues. I hope you would next time make a short video may be part 2 while receiving . I would suggest to use 2 TTGo module, 1 module antenna in vertical and another in horizontal position in reference to earth poles. Standing dipole antenna wont work, I think we should give one more try. Please !!! Thanks in advance :)

@albertbu97 3 года назад

Can you post a link to the telegram please ?

@MrArtVein 2 года назад

@@shashibhushan5418 I'm just learning about this, but I understood what you wrote from my studies in microphone recording. You're saying his antenna will null

@FossaSystems 4 года назад

An update for everyone here: FOSSASAT-1 is shown to be working correctly and healthy. However, due to the antennas not having deployed, the signal is very weak and can only be picked up with large antennas. LoRa remains not functional for small stations due to this. We are working to deploy the antennas manually from earth and hope to fix the issue. We are also launching two more LORA satellites in march to expand the network :)

@Conservator. 4 года назад

Fossa Systems Too bad the antennas haven’t deployed (yet!) but still a fantastic success. I believe Fossasats will have a tremendous impact on the world in general and the world of IoT especially. Congratulations!

@cfeigel 4 года назад

I'm a child of the "space race". My father worked on the Saturn-V rocket in the 1960s. Seeing the renewed interest in space exploration makes me grin like that little kid of fifty-odd years ago! My congratulations to you and the team on your accomplishment! People all over the world are watching and getting excited. This is how it all begins!

@GRBtutorials 4 года назад

Cool! However, won't the satellites eventually fall back to Earth due to air friction? I've seen other CubeSat projects and they all seem to last for only a few months before disintegrating.

@SteveWrightNZ 4 года назад

Was the tape antenna held down somehow? I assumed it self-released once ejected from its' container..

@linagee 4 года назад

Is there a sensor to know for sure if the antennas deployed correctly or not? Maybe on the next version! :-) (Would a small vibration motor also be a good addition to solve this sort of "jiggle it loose" problem?) Edit: Ah, I see on your latest post, solar voltage can indicate if the panels were correctly deployed.

@Stoneman06660 4 года назад

This is brilliant. Thanks, Andreas, for covering it otherwise I'd have been completely unaware!

@AndreasSpiess 4 года назад

That is one of the purposes of this channel...

@minepro1206 4 года назад

Me too

@stationHQ 4 года назад

Just what we have been waiting for since the word Lora became known! As usual Andreas, thanks for your pioneering work and putting us in the forefront of following and joining in the creation of ground base stations! Keep up the good work

@AndreasSpiess 4 года назад

Thank you for your nice words!

@myounges 4 года назад

Thank you Andreas for your efforts to teach and share all this information!

@AndreasSpiess 4 года назад

You are welcome!

@garthmikles3933 4 года назад

Thanks again Andreas for the concise information and instruction. Your work is greatly appreciated and your teaching and sharing with us is profound. I also want to congratulate the Fossa Team for their dedication and I wish them further good luck into the future.

@AndreasSpiess 4 года назад

You are welcome!

@lintangwisesa 4 года назад

Great story & super clear explaination, Sir. Thanks a lot.

@AndreasSpiess 4 года назад

You are welcome!

@anandmoon5701 4 года назад

Good initiative by young scientist, and many thanks to you Andreas for explaining the logic behind the operation. you have made this complex concept much simple to understand.

@AndreasSpiess 4 года назад

The project deserves my support!

@HighestRank 4 года назад

There’s a hoLe in the operation, which explains the probs and low-power mode!

@sarveshk09 4 года назад

Amazing Job 👌 FOSSA Team! And as always thanks for a great video Uncle Andreas!

@AndreasSpiess 4 года назад

You are welcome!

@delta-game 4 года назад

Awesome! Please keep us up to date on this one.

@AndreasSpiess 4 года назад

Maybe you join their twitter account?

@HolgerBarske 4 года назад

Amazing adventure. I hope this going to deliver results soon 👍.

@AndreasSpiess 4 года назад

Me too...

@GeorgeWMays 4 года назад

So cool. An old friend of mine used to say "neatness is its own reward." This stuff is neat.

@AndreasSpiess 4 года назад

:-)

@avejst 4 года назад

Impressive work the young people have done Great intro Thanks for sharing :-)

@AndreasSpiess 4 года назад

I think, too they deserve a big applause!

@ZechyC 4 года назад

Brilliant video. Thanks Andreas

@AndreasSpiess 4 года назад

You are welcome!

@joeynovak07 4 года назад

Wow!!! Sooo cooool!! Thanks for posting this.

@AndreasSpiess 4 года назад

You are welcome!

@metalpachuramon 4 года назад

Wow! That's awesome, I didn't know that there were these kind of satellites for people to experiment with

@AndreasSpiess 4 года назад

This is the first of its kind which should enable cheap sensors on earth

@brainfornothing 4 года назад

Very interesting. Thanks for sharing !

@AndreasSpiess 4 года назад

You are welcome!

@chris.b83 4 года назад

damn, how cool ist that "finger stick" :D

@AndreasSpiess 4 года назад

The original is from my wife's stock. She was a teacher in the 1990 when those were quite common.

@gurudattapanda 4 года назад

Excellent explanation of TLE for geeks and amateurs.

@AndreasSpiess 4 года назад

Thank you!

@StephenFarthing 4 года назад

Another great episode from the ham with the Swiss accent. :-)

@AndreasSpiess 4 года назад

I am just the messenger... But I learned a lot about satellites the last few days.

@david3810 4 года назад

Impressing! Try turning the antenna 90 degrees. The sensitivity is probably donut shaped

@AndreasSpiess 4 года назад

The satellite usually passes in the N-W-S or N-E-S. Hardly ever at 90 degrees

@AllanKobelansky 4 года назад

Nice work. With such interesting stuff you present, I’ll never get any domestic chores done.

@AndreasSpiess 4 года назад

Nice excuse ;-)

@freedom2000 4 года назад

Excellent video Andreas. I really hope that this sat will work quite soon (I'm into space business as well (LEO sats :-))

@AndreasSpiess 4 года назад

We all hope, I think. But learning takes place in both ways...

@lib0r 4 года назад

Excellent video!

@AndreasSpiess 4 года назад

Thank you.

@DD0ULQTC 3 года назад

Exciting like a thriller. Now I'll look for how it went on.

@AndreasSpiess 3 года назад

Recently they upgraded the network to tinyGS (you find a recent video about it)

@electronic7979 4 года назад

Very good video 👍

@AndreasSpiess 4 года назад

Thank you!

@tommihommi1 4 года назад

a tape measure antenna on a Satellite, I never thought I'd see the day

@AndreasSpiess 4 года назад

This is very common. The material is perfect and cheap...

@tommihommi1 4 года назад

@@AndreasSpiess I've built Yagis from it myself, but didn't expect it to be used on satellites. But it makes sense, as you say.

@NoviSavvy 4 года назад

It is a perfect reliable material for satellite antenna as it is easy to fold and extend it

@AndreasSpiess 4 года назад

Look also at the 50$sat

@gurudattapanda 4 года назад

Yes, the material used for measuring tape is an alloy having perfect elastic property to be wound up in a satellite and open up to form an antenna after the kill switches has been released after launch.

@mjp0815 4 года назад

Awesome project.

@AndreasSpiess 4 года назад

Indeed

@CraigPerry 4 года назад

Andreas - when working amateur satellites on the 70cm band with a simple whip antenna from a handheld, i use a whip that’s around double the size of the one shown. Also i have to hold it at an angle and i have to change angle as the satellite passes. If 0 degrees means holding it perfectly vertical and 90 degrees means horizontal, then for best reception i need to hold it at around 15 degrees to acquire the sat as it comes above the horizon then over the next 6 minutes or so i have to follow its trajectory over the sky, keeping the whip antenna pointing perpendicularly at the sat. You probably know all this already but i mention it because a purely vertical orientation is really hard to make work at higher powers so lora powers i expect even more trouble (although lora’s far better sensitivity should help offset this but not sure by how much)

@AndreasSpiess 4 года назад

LoRa promises a very high link budget which should enable sensors with simple and fixed antennas. Otherwise the whole concept would be useless... There are other people with big yagis in the project, I am only interested in the sensor use case.

@PhG1961 4 года назад

Amazing !!

@AndreasSpiess 4 года назад

Indeed!

@wayne6220 4 года назад

Thank you for your amazing video.

@AndreasSpiess 4 года назад

You are welcome!

@electronicbasics1856 4 года назад

Wow, satellite for engineers !!!

@AndreasSpiess 4 года назад

Yes!

@Caffein780 3 года назад

Brilliant!!

@AndreasSpiess 3 года назад

Thank you!

@deangreenhough3479 4 года назад

Awesome🏴󠁧󠁢󠁥󠁮󠁧󠁿

@AndreasSpiess 4 года назад

I think, too!

@HarishKumar-fo4hd 2 года назад

Sir Ji your work is totally ok thanks again your help in this chanal

@AndreasSpiess Год назад

Glad you like the channel!

@macieksoft 2 года назад

Ballistic coefficient (BC) is usually defining how much drag is the object generating. On LEO satellites are subject to the orbit decay based mainly on drag, there is still a little bit of atmosphere up there. BC is often used in ballistic calculators because different bullets have different shape and they generate different drag.

@AndreasSpiess 2 года назад

Thank you for your information!

@alexandrecoste1190 2 года назад

Hi Andreas, i see FossaSat-2E1 has been launched and it could be very nice to update your video and see how its moving now. Thank you so much. Happy sunday.

@AndreasSpiess 2 года назад

Currently there are 6 Fossasats in the air and I receive some of them regularly...

@alexandrecoste1190 2 года назад

@@AndreasSpiess Hi sir Andreas, Thank you for your quick answer. did you success to send packet by Fossasat finaly ?

@n0madfernan257 4 года назад

hi, this is interesting. thanks for this.

@AndreasSpiess 4 года назад

You are welcome!

@Boretoto 4 года назад

Great! Could you make a video about a sound card measurement with PC ( THD, THD+Noise, etc., resistance substitution box connection or simply resistor) ? How to connect properly all of them. Thank you!

@AndreasSpiess 4 года назад

I am no Audio guy and do not have a lot of knowledge there.

@luwang404 4 года назад

The efforts need to be appreciated at least whether the signals are strong or weak or even lost.

@AndreasSpiess 4 года назад

We still can hope :-)

@bramv1984 4 года назад

Thanks for the excellent video again! You show two Baofeng radios, the UV-5R and (I presume) the UV-82. Do you prefer one over the other? :)

@AndreasSpiess 4 года назад

I do not use them often. So I have no opinion.

@jamesdriscoll_tmp1515 2 года назад

Have you had enough time to form an opinion?

@jamesallred2970 3 года назад

I so enjoyed this ❤️❤️

@AndreasSpiess 3 года назад

:-)

@AA-gl1dr 3 года назад

i’m so glad i just found this

@AndreasSpiess 3 года назад

:-)

@Conservator. 4 года назад

I’m still trying to find the TLE for my test Arduino Pro Mini and RFM95 . . . Now on a more serious note: Andreas: this is the first time you managed my heartbeat really sped up this is the first time while watching your video. I really felt the tension when you reported on the failed communication attempts at the end. I vigorously hope Fossa will wake-up in the near future. Otherwise, we’ll just have to wait for the next one(s!) to be launched. What an exiting project.

@FossaSystems 4 года назад

We are healthy with some packets recieved! Still hoping to deploy antennas :)

@AndreasSpiess 4 года назад

I hope you found the link to the TLE file in the description...

@Conservator. 4 года назад

Andreas Spiess For the simulator?? I’m sorry, I thought that would be funny.

@MalagasOnFire 4 года назад

Gonna try to run the program Gpredict in wine :D Portugal needs some ground stations ;) but we need to check if requires a licence, for XMIT data. Thanks for all the information.

@AndreasSpiess 4 года назад

It for sure needs a license for transmit, I think.

@linagee 4 года назад

Weird, why wine? It can be compiled and ran in Linux...

@MalagasOnFire 4 года назад

@@linagee because it takes less time in this machine ( Edit ). Sorry there are pre-compiled images. Take what i said :P Oppss. Thanks for the developers and linagee for the advice , my apologies :P

@johng7rwf419 4 года назад

Very interesting...

@AndreasSpiess 4 года назад

Thank you!

@TheBodgybrothers 4 года назад

You'll need some directivity on the antenna to avoid out of band rf causing input desense. Use a dish antenna instead.

@AndreasSpiess 4 года назад

Then we would be back to standard satellite technology, I think.

@otm646 4 года назад

@@AndreasSpiess It's only the antenna not the hardware, protocol or spirit of the project. I understand why you want to use a standard antenna but if you continue to not receive a signal switch to a dish, this micro satellite won't last long. I'd rather see you succeed using a dish than be unsuccessful with a standard antenna. Your potential success would be a huge boost to the LoRa community.

@AndreasSpiess 4 года назад

There are people with big antennas helping Julian to fix the problem.I hope they will be successful. Then I can try ma small antenna...

@TheBodgybrothers 4 года назад

Just stick your antenna in a wok. 🤣

@IndianTinker 4 года назад

That hand !!

@AndreasSpiess 4 года назад

As always!

@ladedk 4 года назад

This is insanely cool!!! I work with supporting research in very remote areas, and I can see a huge potential for this technology. I cannot wait to see it expanded. On another note, Andreas, have you ever checked out CuriousMarc's YT channel? Amazing if you're into older computer Technology. Among other things, he's involved in restoring an Apollo Guidance Computer module. Truly fascinating stuff!

@AndreasSpiess 4 года назад

I know his channel, but I am not a frequent viewer... The Apollo stuff was quite interesting.

@linagee 4 года назад

By LoRa being sent/received to this satellite at around 500km, doesn't this break your previous record of 150-200 km? :-) Awesome!

@AndreasSpiess 4 года назад

The land to air records are 800km. Mine is land-land;-)

@samuelsontun9202 3 года назад

Tunisian tech company Telnet turned your wishes into reality. Lora is working out there and they received the signal for their first experience with a 4kg satellite. They did Great job for advancing Iot.

@AndreasSpiess 3 года назад

You are right, there are now many more satellites in the orbit using LoRa. Most of them are even smaller than 4kg.

@zoonvanhetuni7993 4 года назад

BRAVO !

@AndreasSpiess 4 года назад

:-)

@volkinaxe Месяц назад

hope they make more of these

@AndreasSpiess Месяц назад

There are quite a few satellites up now.

@volkinaxe Месяц назад

@@AndreasSpiess is there any info like a website that shows there orbit also hi from new Zealand

@volkinaxe Месяц назад

up date i was hoping this was meshtastic i will wate intill this is set up as a setting on it

@SianaGearz 4 года назад

Reminds me of a satellite by demogroup TRSi which is set to broadcast a Commodore-64 demo "10 Orbyte" which can be received with a Realtek DVB stick used as SDR.

@cheaterman49 4 года назад

Wait what? o__O how did they get the funding?

@SianaGearz 4 года назад

@@cheaterman49 Difficult to say to what extent it's self-funded or to what extent it's a university collaboration (RTWH Aachen), i don't remember this being spoken about. The costs aren't astronomical, excluding personal labour, they have to be within like 2 dozen grand in material and external costs, because the sats are so tiny, like only 5cm across. If you want to look up the guy, the name is Paul Kocyla and that was back in 2013-ish and he has launched 2 other satellites since, all bearing TRSi naming or content.

@cheaterman49 4 года назад

@@SianaGearz Oh wow that was much more recent than I was expecting, that's also why I expected much higher costs (price of house instead of price of car in this case). When you said demoscene I was expecting 80's stuff :-) but yeah if it's a pocket sat the cost is reasonable (in the same ballpark as FOSSASAT-1). Will definitely look it up, thanks for the info! EDIT: If anyone is interested, I think this is the video to watch: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-enqrZj6oTC0.html

@kslog954 4 года назад

That notification sound @1:13, distracted me for checking Telegram :D

@AndreasSpiess 4 года назад

:-)

@spiritcore1 4 года назад

Hi Andreas, What type of LoRa the satellite receives and transmits? Does it have encryption? Trying to understand if LoRa is legal in my country (even as ham op). Thanks!

@AndreasSpiess 4 года назад

You find the LoRa config in the groundstation sketch

@bluef1sh926 4 года назад

On that PCB any non lead, RoHS solder joints will break apart at -10 celsius, space has far lower temperatures.

@whydohandlesexistAAA 4 года назад

Won't radiation also be a problem with normal components that are not radiation hardened?

@Conservator. 4 года назад

AliveC4T Edit: there have been quite a few successful connections reported on Telegram. Oops, I hope you’ll forgive me but I sincerely hope (maybe against better knowledge) that you’re wrong. Wouldn’t the team have been warned about these basic things? And wouldn’t it be tested in a similar environment? I’ve no idea but this seems rather obvious if you’re launching something into space. Just thinking out loud here. Can anyone expand on this? Edit: watching the video again and seeing the environment in which the prototype is shown, I’m sure they will have used space grade components for the real thing.

@FossaSystems 4 года назад

Everything is lead ;) Either way I do not agree, Tin is only an issue due to tin whiskering. We have tested the satellite down to -40c and currently, it is working correctly and healthy (although without the antenna deployed)

@aleksandersuur9475 4 года назад

If ROHS solder broke apart at -10C no modern car could survive winter, so that's flat out wrong. And "space is cold" is misunderstanding things, being exposed to 1361 W/m2 of sunlight while in vacuum is quite toasty. Which is the reason satellites are usually covered in reflective foil or painted bright white - to reflect away much of that heat.

@dflate 4 года назад

@@FossaSystems Silly internets questioning your work! Keep up the good work. Wish you the best!!!!!!!!!!!!!!!!!

@science4allworld587 4 года назад

I wonder do i need any SDR etc to get info from fossa via lora board? How do i know when i get signals from Fossa?

@AndreasSpiess 4 года назад

By listening the frequency using a LoRa module

@FieelFlying 4 года назад

The aliexpress links in the description of your video aren't working! I am struggling to choose the correct boards given how wide the selection is

@AndreasSpiess 4 года назад

I just checked the links. They worked. And nobody complained so far. Do you have an adblocker or something like that?

@v-king936 4 года назад

Don't bother ordering any of those, Fieel Flying...: Fossa's telegram channel states that only SX1268 based modules are supported by satelite. TTGO and HelTec's ESP32-LoRa boards are SX127x based which is incompatible with the satellite's protocol (I guess the Sync word being different and only SX126x LoRa modules are able to get this right). HelTec is producing an SX126x based board: the CubeCell - Dev-Board, but it's ARM Cortex M0+ Core, which is not working on the fantastic sketch by G4lile0 , because the M0 core cannot run the necessary ESP libs for connecting to Fossa's MQTT system)

@Cptnbond 4 года назад

Hi Andreas, great stuff, I will definitely try this out, just for fun. Would it not be good to improve the ground-station antenna system to improve our chances for sat communication?

@AndreasSpiess 4 года назад

There are others with bigger antennas. I do not have one. Bu I also do not want a bigger one on my future sensors...

@rkan2 4 года назад

I think usually you only need to pay for liability insurance when launching.

@science4allworld587 4 года назад

How did you manage to get the list of possible timing of fossat available at your location? I can see any option to get such prediction table ?

@AndreasSpiess 4 года назад

There is a link in the description to the TLE file

@science4allworld587 4 года назад

@@AndreasSpiess but that gives only one prediction...

@AndreasSpiess 4 года назад

No. You find more than one passes in the program.

@Magic-Smoke 4 года назад

Excellent video Andreas. It would be worth adding the @fossasys Twitter feed to the list here for us to get the latest news. You might want to encourage people not to use your callsign as I fear some may just copy the settings :). Of course, you may want HB9 stations all over the globe ;) = lol.

@AndreasSpiess 4 года назад

I will add Twitter . Copying call signs is not to complicated, I think.with RF, these days it is very easy to do illegal things (just look what is available on AliExpress). This project probably will not change that fact :-(

@Magic-Smoke 4 года назад

Andreas Spiess indeed you are correct 😀

@MrFatjonable 4 года назад

I'm now sitting on the first row!!

@AndreasSpiess 4 года назад

Welcome aboard the channel!

@LeonardoBaracat 4 года назад

Hi Andreas, great video. Excelent subject coverage. I was wondering if you could help me with gpredict. I installed the software via linux repository and updated the TLE info. Everything is working like a breeze. But I couldn't find the sats (84001,84002 and 84003). Did you make any customizations/settings? Pointing to any new TLE source, for example... Thanks in advance, Baracat

@AndreasSpiess 4 года назад

You need to load the TLE file I provided in the comments.

@shareefind 4 года назад

As per lora-alliance end device requirements for certification is required frequency is 865-867 in India, so please let me know can I use 433Mhz device for fossasat-1, as u have suggested?

@AndreasSpiess 4 года назад

I do not know the law in your country.

@ericlaird1745 4 года назад

What about a more directional antenna, like a small yagi or PCB directional antenna. Use servos to point it. Gpredict should provide az-el control data and feeding that to an arduino or esp32 to aim the servos should give you the ability to track it.

@AndreasSpiess 4 года назад

I do not like the idea of a low power sensor with servos...

@tommh44 4 года назад

Thanks for your excellent coverage of this. I ordered the TTGO board that you mentioned on the video. The groundstation software runs just fine. But since I have yet to hear a signal, don't know if it actually works. I wonder what you mean by "unsupported" It shows up on the map km5h_1 right in the middle of the USA.

@AndreasSpiess 4 года назад

Maybe you join the discussions on the telegram channel. There are two problems: 1. The satellite did not extend its antenna and 2. they discovered that the SX1276 modules will not support tis version of the satellite. Hopefully it will work with Sat-2...

@tommh44 4 года назад

Andreas Spiess thanks for taking the time to reply. Your latest video helped a lot clearing my confusion. My board says v1.6 but requires V2 in the software. Can’t tell which sx12?? That I have. Anyway I am ready for SAT-2 thanks to you.

@AndreasSpiess 4 года назад

Your chip is a 1276 or 1278 (depending on the frequency)

@ToDoNoHarm 2 года назад

For anyone looking at this in 2021 or later, the FOSSASAT-1 (Norad CatNum 44829) was DECAYED on the 28th day of October in 2020. It is no longer operational.

@AndreasSpiess 2 года назад

Unfortunately, this satellite was never operational because the solar panels and the antenna did not unfold. But there are other satellites. Maybe you search for "tinygs", a project which evolved out of this satellite launch...

@AJB2K3 4 года назад

Would Fossasat1 communications become oversaturated by requests resulting in DOS type attack from all these peoples trying to access it so soon?

@linagee 4 года назад

RF itself has never been DOS-proof... (It depends on large government entities to come around and stop people transmitting when they shouldn't be.)

@FossaSystems 4 года назад

No, the satellite will just ignore what it cannot handle...

@imranrajjad7028 3 года назад

I wonder we could see what kind of Antenna would be suitable for communicating with this satellite, maybe a Video?

@AndreasSpiess 3 года назад

We will see. They have new satellites planned...

@Space_Investing 3 года назад

Hellooo, how far is the range on these? Is there a limit? Thanks in advanced...I just subscribed.

@AndreasSpiess 3 года назад

These satellites cover every point on earth. But this particular one newer worked properly and is switched off by now.

@ginogalimberti2847 4 года назад

HAMMER! 👍✌️😎

@AndreasSpiess 4 года назад

Danke!

@WILLMARFERNANDOROMEROMARIN 2 года назад

Greetings from Colombia, How is it possible for a LoRa to have sufficient range in distance?

@AndreasSpiess 2 года назад

Maybe you watch my videos on LoRa. You find a playlist on the channel.

@ZamanTurja 4 года назад

Thanks a lot sir, helped me a lot

@AndreasSpiess 4 года назад

You are welcome!

@ikokovidis56 4 года назад

Well done Andreas ... Very interesting project 73 DE SV2LLJ IOANNIS

@AndreasSpiess 4 года назад

Thank you! 73 de HB9BLA

@JohnTarbox 4 года назад

Andreas, would you please post a status update on this project?

@AndreasSpiess 4 года назад

You get the updates on their telegram channel. The satellite is still not available for the general public because its antenna is still not deployed. So we have to wait for the next one in spring.

@AdityaMehendale 4 года назад

Grutti Andreas! What would be the best orientation of an antenna when trying to connect to something at 500km up? Would it be worthwhile to tilt the antenna depicted at 12:10 to prevent a "blind-spot" directly overhead? Obviously, the radius of "footprint" on the world-map is more that 500 km, so the satellite wil mostly be at

@AndreasSpiess 4 года назад

The satellite is nearly never overhead. To also not exaggerate the directivity of a dipole. It is only a few dB. The first passes were in the East and west.

@crckdns 4 года назад

At first glance the idea is great and I hope it will work out as they hope! Yet, for me the satellite cube shown doesn't look like space ready. Also I doubt they invested a lot of needed money and time for hardening against the space radiation.

@Conservator. 4 года назад

crckdns Hi Edit2: there have been quite a few successful connections reported on Telegram! Edit: having watched the video again and noticing the background at which Julian is filmed, I assume they tested the real satellite for these things. AliveC4T mentioned that too. And also that non-leaded solder would breakdown at temperatures below -10°C. Could you elaborate on both? I would be surprised if the team weren’t warned for this and wouldn’t have done any testing for these environments. I’m just thinking out loud here. I’ll appreciate any comments from you (and anyone else).

@FossaSystems 4 года назад

The satellite has various protection systems and circuits against single event upsets and latchups, we have tested it in thermal vacuum chambers. So far it is healthy in space although the antennas have not deployed.

@Conservator. 4 года назад

Fossa Systems Thanks for the update and congrats. Even without the deployed antennas still a huge success as far as I’m concerned!

@josephmartinelli97 4 года назад

I use Gpredict 2.2.1 updated but, when I want to create a new module, in the list, there is no Fossa satelitte ... I found FO-29 ; 98 ; 99 ; FORMOSAT-3 FM1 to FM6.

@AndreasSpiess 4 года назад

There is a link to a TLE file in the video description

@aleksandersuur9475 4 года назад

Ballistic coefficient is an aerodynamic parameter, it's used to calculate how fast the orbit will degrade.

@AndreasSpiess 4 года назад

Thank you. What I wanted to say is that I could not explain how to do the calculations ;-)

@aleksandersuur9475 4 года назад

@@AndreasSpiess yeah, the calculations get quite complicated. Anyone could figure out the straight forward Newtonian two body problem, but that's not very precise long term. Real models account for the tidal effects of Moon and Sun, oblateness of the Earth, atmospheric drag - good models include real time space weather data in that calculation not just an average approximation etc. The model that Gpredict and most other tools available for home player use is SGP4, back in the day NORAD published source code for it and since then it has been implemented in various languages, you can download the source code and include it in your program, feed it the TLE and time and it calculates where the satellite is, give it your location and it even converts it to coordinates you can point for example an antenna dish at. en.wikipedia.org/wiki/Simplified_perturbations_models

@ElvisCompost 4 года назад

Andreas, you say that FOSSA uses 436.7MHz but the TTGO & RFM95 boards in your links are 433MHz. How are the frequencies converted?

@AndreasSpiess 4 года назад

The TTGO can handle this frequency.

@linagee 4 года назад

The manual on RFM95 says a "433Mhz module" can actually be tuned from 410Mhz to 525Mhz. (Obviously you have to be aware of the correct licensing and power requirements to transmit on whichever band you're tuned to. Also, your antenna should be optimized for the frequency chosen.) Page 13: cdn.sparkfun.com/assets/learn_tutorials/8/0/4/RFM95_96_97_98W.pdf

@ElvisCompost 4 года назад

Thanks for the information. I had no idea that the TTGO could handle such a frequency range.

@LawpickingLocksmith 4 года назад

Thanks Andreas, very interesting. How come the el cheapo Baofeng hears something? Got to ask my mate Art VK4GO as he has spare time and more open skies.

@AndreasSpiess 4 года назад

The Baofengs are not completely crap. And obviously the signal (of the other satellite) was quite strong.

@MangustaMG20 4 года назад

Andreas, thanks for the video, but I wonder if you have the correct Antenna polarisation. The satellite has either circular or Linear polarised antenna. The configuration of your antenna setup, it looks, is not correct, assuming linear polarisation. Try and tip the antenna to lie flat the the earth, and align it 90 degrees to the satellite path. In addition, those antennas that are bundled with devices are really not great. Another project to build your own 1/4 wave dipole could be very successful!

@AndreasSpiess 4 года назад

The satellite has a moving linear polarization which we du not know, because it is moving. The difference between horizontal and vertical is around 3 dB. If the system should work, it should work with such antennas. Otherwise it would be useless.

@nathanw851 3 года назад

Is FossaSat-2 still scheduled for Jan '21?

@AndreasSpiess 3 года назад

I do not know.

@soumitradey8208 4 года назад

Is heltec lora 32 inbuilt antenna suitable? Or need external

@AndreasSpiess 4 года назад

We have to see when the satellite is fully operational.

@soumitradey8208 4 года назад

@@AndreasSpiess thanks Sir, i tried today from my ground station at new delhi, when fly by was scheduled, i used the heltec eso32 lora, no packet received but i got system information of satellite data like solar panel voltage, temperature

@marinehm 4 года назад

Can they send an MQTT message to bring it out of low power mode? That would be disappointing if it doesn’t communicate with the ground stations.

@AndreasSpiess 4 года назад

They try various things. You can follow them on telegram

@josedavid6400 4 года назад

can't get fossa from gpredict even after update TLE data from network several times. Do you know an alternative way to track them? Thanks for another good video mate!

@AndreasSpiess 4 года назад

As I said in the video, you still have to upload it from a file. You find a link it in the description.

@josedavid6400 4 года назад

Andreas Spiess Thanks! I missed this comment. Already working, hope this night catch up with SDR. Thanks!!!

@codebuster2716 4 года назад

Hmmm, very interesting. I probably need to buy public liability insurance before I start my own project. Who knows, my Satellite might mulfunction and knock someone out leading to an expensive lawsuite.

@AndreasSpiess 4 года назад

Maybe the litter of the rocket needs more insurance as it can hurt somebody on earth ;-)

@aleksandersuur9475 4 года назад

A cubesat reentering Earths atmosphere brings to mind the phrase "snowball's chance in hell". And as cubesat operator your maneuvering options are limited to differential drag at best, therefore you basically have no responsibility over any possible collisions your satellite might have, because it's completely out of your control. You don't even get to really choose where your satellite will be released, at best your choice is with which rocket you want to ride along.

@robertoshannessy1389 3 года назад

Hi there, is it possible to make a geostationary satellite with Fossa or with a Cubesat?

@AndreasSpiess 3 года назад

I do not think so. Fossasats are at 500 km max and Geostationary satellites are on 36000km. I did a video series where I communicated across a Geostationary satellite (QO-100)

@mschorer 4 года назад

Interesting, that you use the Arduino IDE instead of the Visual Studio Code which you once showed on this channel. What is the reason?

@AndreasSpiess 4 года назад

Most of my viewers use Arduino IDE. The ones with platforms know how to port it to their platform. The other way not.

@dd0356 4 года назад

vs code is very confusing and requires a lot of time for people like me. arduino is the "default" which is used by everyone.

@mschorer 4 года назад

jk44 v2 agreed! And I thought I am the only one who has trouble with VCS 😂

@johncrunk8038 4 года назад

I use VSC whenever I can. Most of the problems arise when sketches don't follow the C/C++ rules; like putting functions in the sketch after they are called. If you put the "#include at the top of most sketches, the VSC/PlatformIO usually works fine. I usually have to create a header file with prototypes for functions if they are not properly coded. Generally I am very happy that the Arduino team got the ball rolling, but they put a lot of crutches in the system that makes a transition to a "real" programming environment difficult for beginners.

@silvioalvim 7 месяцев назад

I don't quite understand the purpose, I apologize if I'm being too newbie, but would it be possible to send data between two very distant ground stations using one of these satellites as a bridge?

@AndreasSpiess 6 месяцев назад

This could be made. So far, I only know commercial small satellites that do it.

@pulesjet 4 года назад

No License in hand but I should be able to at least catch the Beacon using my SDR ( Software Defined Radio ) and a simple Helical Antenna. Good Luck Attempting to deploy the antenna Sir.

@AndreasSpiess 4 года назад

Good luck!

@pulesjet 4 года назад

@@AndreasSpiess San to hear the Antenna failed to deploy, eaa?

@AndreasSpiess 4 года назад

Yes :-(

@pulesjet 4 года назад

@@AndreasSpiess Have they managed to get the antenna to move? Figure out what didn't happen. Guessing something expanded due to cold temps and bound up ?

@AndreasSpiess 4 года назад

They discuss the details in the Telegram group. I do not closely follw...

@SchoolforHackers 4 года назад

This is how we build freedom. Bravo.

@AndreasSpiess 4 года назад

:-)

@sanjaymistry-sales 4 года назад

Hi Andreas, (I'm a big fan of yours). Anyways, is there any update on LoRa satellite?

@AndreasSpiess 4 года назад

Maybe you join their telegram channel? There you should get the news.

@Berilium65 4 года назад

You might want to try a circular polarized high gain antenna.

@AndreasSpiess 4 года назад

This system is for sensors. If these need high gain antennas, it will be worthless.

@johnwashell4351 4 года назад

@@AndreasSpiess Not necessarily, you still have to wait for the satellite to be near over head, so store and forward, isn't the worst idea. With your whip antenna, you have a deep null looking up, as the pattern is donut shaped, and neither receives nor transmits in the up direction. If you can get info on the sending antenna such as linear or circular polarization, you can optimize your link quite a bit. You could also try mounting your antenna horizontally, and add a reflector 1/4 wavelength below it to get 3dB of antenna gain.

@johnwashell4351 4 года назад

@@AndreasSpiess The link budget is a bit tight for hobby grade links. The expected path loss is -153.3dB. It doesn't say it has a dipole, but seems to imply that with the antenna gain spec. With the sat floating in space, there is no way to determine its angle to the earth at any given time. It you use a linear polarized antenna, you could still be cross polarized, and lose 30dB of signal. A helical or two yagis phased in quadrature would be the way to go. Although these can be high gain, they can still have enough sidelobe to communicate terrestrially to other lora nodes.

@hopje01 4 года назад

If this sat is tumbling around in space, I would think you get a lot of up/down link signal fluctuations?

@fanest_norfar 4 года назад

I just hope that these small satellites are designed so that when they expire quickly fall down so that they don't litter the space.

@AndreasSpiess 4 года назад

That is the case.

@fanest_norfar 4 года назад

@@AndreasSpiess I'm not sure if you are aware of this but latest Starlink satellites are causing quite an uproar in astronomers community, because when a group of these satellites shows on the night sky they completely destroy images of telescopes. Maybe these much smaller satellites are a way forward.

@jospicant 4 года назад

I can not find fossa Sat in gpredict ( I have update but don't apear ). Congratulations! It is an amazing video

@AndreasSpiess 4 года назад

Currently you still have to load a file. You find the link in the description

@kermets 4 года назад

where do you load that txt file ?

@linagee 4 года назад

Try 44825. (I got "44825" from their tweet here: twitter.com/FossaSys/status/1203012305698672640 )

@lucabertagnolio9166 4 года назад

linagee I believe the correct catalog number for FossaSat-1 to be 44831 aka 2019-084H

@kermets 4 года назад

Makes sense because I cant see any 44825 that has launched 6-12-2019 but 44831 is there, Object H www.n2yo.com/database/?m=12&d=6&y=2019#results

@VincentFischer 4 года назад

Wow these things are tiny. I know cube sats were tiny but this thing..! I wonder how durable this is, exposing pcb and hobby grade components to space

@AndreasSpiess 4 года назад

Maybe you go to www.50dollarsat.info/ ? It survived quite a while