NASA sends and receives signals from space and my mobile fails to receive signals from its nearest tower why?

Question

i am curious about exact technological issues around this issue,NASA monitors its mars exporer and moves it around that planet from here,i cant understand why that technology cant be used here?

Answer 1

NASA has dedicated frequencies, high-gain focused antennas, and NASA doesn't transmit directly to the rovers. They transmit using a very tightly focused beam with the Orbiter, which relays to the rovers.

Plus they don't have buildings and such in the way.

Answer 2

I can see you trying to get into the mall with a 40 foot dish antenna hauled behind you radiating hundreds of watts.
Go back and look at mobile phones before cell phones. There were about 1,000 in all of the city of Chicago and were costly and restricted to a few high level people. Cell phones automatically track from antenna to antenna and allow the same number of people in each cell that were once allowed in the whole city. Computers do the matching and switching. You are carrying a high level of technology in your pocket, but it is still radio and subject to buildings, metal, and weather.

Answer 3

if the same technology is used here, you might end up paying ur whole wealth for a month's bill.

the gsm/cdma spectrum is shared by many people in the cell, and there can be congestion, many buildings in the way affecting signals, etc.

NASA - from mars to earth station there is nothing obstructing. e.g. dish antenna, it receives signals from satellites with very less error rate because there is hardly anything between the satellite and the dish. but it's not the same with cell phones.

Answer 4

Many of the technologies that have become a household name took 40 to 50 years to develop and make them economical enough for an average person's use.

Cameras, binoculars, telescopes,video cassette recorders, computers, xerox machines, photocopiers etc existed long before they were put to general use.

Answer 5

The picture in the link below will answer your question. Signals from space probes are received by huge dish antennae. Now, if we could just figure out how to attach those to our cell phones...

Answer 6

NASA's capabilities to transmit and receive signals cost billions of dollars, your cellphone is $100. The difference is the instruments they use.

Answer 7

Perhaps they use powerful transmitters and large antennas. Your phone uses two AA batteries and an antenna the size of a popsicle stick.

Answer 8

channel or frequency used.
power or ampage
better equipment
satelite connections