Can you explain how the satellites keep tracking the earth's motion around the sun ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-WA5orDm3axY.html It says here it can't be
Also a RU-vid or a Netflix video is an on demand video, meaning each user can start watching at any time. So that is exclusive session created per user. So it becomes a multicast. Where's a TV stream is a broadcast where everyone is viewing the same frame.
sir your efforts are admirable. . really very informative video. I have watched all videos of this channel. thank you so much for increasing our knowledge. keep continue sir .best wishes
Great theory... how they have solar panels that last longer than any other and batteries that never need replacing and fuel for the thruster that never runs out is amazing.
Commercial satellites generally last between 5-15 years and have enough fuel on board to last that long. They're also equipped with solar panels of high efficiency, usually around 30-34% compared to the 15-20% efficiency most ground solar panels absorb. So they do run out fuel. When they do, it can no longer be kept aligned to Earth and eventually fall out of orbit and gets burned up.
Excellent video. Still, I would like to make a small correction: the main reason that allows using a smaller dish antenna is the use of a higher operating frequency and not exactly the power involved in the transmission. The higher the operating frequency, the shorter the wavelength. Therefore, a smaller antenna can be used while maintaining directivity.
You have forgotten another more important detail, how far away should the supposed "satellite" be, how much transmission power is needed and the maximum bandwidth? I don't think a satellite is in the middle of this triangle, instead I think a lot of terrestrial repeaters are used, and terrestrial TV dishes pick up signals that are bounced back into the atmosphere. With the amount of television channels that there are in the world, I have never heard of a satellite failing or a satellite being repaired, or a television satellite going down.
I am trying to understand if DirecTV or equivalent has one satellite orbiting the earth, how are so many dishes across the country able to pickup that signal? Can the same satellite signal / radio wave signal be distributed over such a wide geographic area, or how does that work? If there is one satellite that is staying at a fixed position, and dishes in Los Angeles and New York are pointed towards it, is that satellite able to beam the same signal to both dishes? Thanks!
An excellent video, but i must say it needs a minor (but important) correction. There is no centrifugal force, just centripetal force and it is the equivalent resultant of the system. The gravitational force is a force that is part of this system and contributes (eventually along with other forces) to achieve the resultant of the system (the centripetal force). That`s an application of Newton`s Second Law.
How geostationary satellites orient themselves (some form of GPS, ground reference signal) to make sure they remain in the same position relatively to their ground reference point?
A delay on satellite can be delayed between 5 to 15 secounds in Europe. It is also how the signal is transmitted. Example CNN International is delayed 25 secounds at 1 degree west. And on Astra 28 degree east it is delayed about 18 secounds.
Wonderfully instructive video. Especially I didn’t know how internet TV was different from regular TV broadcasts . Many thanks for the enlightening video.
Thank you for making this informative video. Please make video explaining the details regarding satellite tv considering following as major questions - 1. How does satellite recognise the customer's dish in spite of one way communication? 2. How access to only certain channels is given to the customer based on subscription? 3. When we stop paying the subscription, access to channel gets disconnected. When we pay, it starts again. How does this work? Please reply till the video gets made.
Do all satalite orbit around the equator? Or do they change angles they rotate at? Like would a satalite broadcasting to Brazil be rotating relatize to brazil, and same thing for iceland, or would they both be orbiting at the equator?
@@shaungranger2166 electrical huh, that’s bs, anyone that believes that is insane and needs a tin foil hat…these would burn up from extreme temperatures
@@snakeNP215 because the primary, source of power is solar power that's why logically I thought electrical power, but I think they do get serviced once in a while refueling etc
Wait, so the signals are broadcast in a line, i thought EM waves travel outwards like a sphere of wave, wouldn't you need tons of satellites to broadcast a single signal to each antenna.
The video is slightly misleading. In reality the satellite emits waves as a cone that "lits" a specific region of the earth, pretty much like a very directional lamp would do on a table. At earth surface, the waves can be approximated as a plane moving torwards the ground (given the huge distance) so the receiving dishes have to be aligned perpendicular to that plane
Correct, the reason why I move to IPTV because it's now more reliable than satellite TV. Perhaps, the previous satellite TV company keep losing demand and now bankrupt ☠️
Sattelite Tv never use tower like cell phone tower. Only Terrestrial Tv service use Tower or broadcast antenna on ground. DVB T2 is latest technology for terrestrial Tv broadcast
Dear sir ,, really it was very useful knowledge for us. You describe very gently and simple method please give us your next video realeted of settelite.
HELLO THANKS FOR MANY PHYSICS EDUCATIONAL VIDEOS WHICH YOU PROVIDE US. MY REQUEST IS CAN YOU PROVIDE A VIDEO ABOUT A MAGNETIC LEVITATION TRAIN (MAGLEV TRAIN)
It’s also amazing how LEO satellites work like Starlink world WiFi beaming data both ways. DTC direct to cell phone calls next year. No more lost planes or hikers
This nice video has reminded me the passage below; Id like to share this different point of view of truth: "If, for example, there is one point on a piece of white paper and two or three other points are jumbled around with it and then someone who already has numerous jobs tries to distinguish them, he will be confused; and if many burdens are loaded on a small creature, it will be crushed; and if numerous words issue from one tongue and enter one ear altogether at the same time, their order will be broken and they will be a muddle. Despite this being the case, I saw with complete certainty that with the key and compass of HE, although thousands of different points, letters and words had been put in each molecule -and even in each particle- of the element air, through which I journeyed in my mind, neither did they become mixed up nor did they spoil their order; and although they performed a great many different duties, these were carried out without being confused in any way; and although very heavy loads were laid on each molecule and particle, they bore them in order without lagging or displaying any weakness at all. And I saw that thousands of different words of all different sorts enter and issue with perfect order from what is in effect those minute ears and tongues without being mixed up and spoilt in any way, they enter those minute ears and issue from those tiny tongues, and by performing these extraordinary duties, each particle and each molecule declares through the enraptured tongue of its being and its perfect freedom, and through the testimony and tongue of the above truth: THERE IS NO GOD BUT HE, and: SAY, HE IS GOD, THE ONE, and travels among air-clashing waves like storms and lightning and thunder without in any way spoiling their order or confusing their duties. One duty is not an obstacle to another duty. I observed this and was utterly certain. That is to say, either every particle and piece of the air has to possess infinite wisdom, knowledge, will, and power, and the qualities for being absolutely dominant over all the other particles so that it can be the means of those functions being carried out, which is absurd and impossible to the number of particles, and no devil even could imagine it, or else, and it is self-evident to the degree of 'knowledge of certainty,' 'vision of certainty,' and 'absolute certainty' that the page of the air functions through the boundless, infinite knowledge and wisdom of the All-Glorious One, and is the changing page for the pen of Divine Power and Determining, and like a signboard for writing and erasing, known as a Tablet of Appearance and Dissolution, which has the function of the Preserved Tablet in the world of transformation and change. Thus, just as the element of air demonstrates the above-mentioned wonders and manifestation of Divine unity in only the duty of transmitting sound and shows the impossibilities of misguidance, so does it perform other important duties with order and without confusing them, such as transmitting subtle forces and energy, like electricity, light, and the forces of attraction and repulsion. At the same time as conveying these, with perfect order, it carries out duties essential for the lives of plants and animals, such as respiration and pollination. It proves in decisive fashion that it is a place of maximum manifestation of the Divine will and command..." From "Words" - 174, by Said Nursi
So, at any point of time, the broadcasting satellite is releasing signals for all the channels and it is the receiver (set top box) that selects the channel to be displayed on the screen...?
