A very low earth orbit satellite orbits the earth in 92 minutes and is in darkness for half of each orbit. The satellite requires 2.5 kW of electrical power, which must be supplied by batteries when the sateMite is in darkness. While the satekite is in sunlight, its solar cells must supply sufficiert power to run the sateMite and charge the batteries. Charging the batteries requires 1.25 times the power that is needed to operate the satelkite. Exercises a. How much power must the solar cells supply while the satellite is in sunlight? b. The solar cells supply current at 50 V. How much current do they deliver? c. The satellite is in darkness for 46 minutes of each orbit. What capacity must the batteries have, in ampere hours?
A very low earth orbit satellite orbits the earth in 92 minutes and is in darkness for half of each orbit. The satellite requires 2.5 kW of electrical power, which must be supplied by batteries when the sateMite is in darkness. While the satekite is in sunlight, its solar cells must supply sufficiert power to run the sateMite and charge the batteries. Charging the batteries requires 1.25 times the power that is needed to operate the satelkite. Exercises a. How much power must the solar cells supply while the satellite is in sunlight? b. The solar cells supply current at 50 V. How much current do they deliver? c. The satellite is in darkness for 46 minutes of each orbit. What capacity must the batteries have, in ampere hours?
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Transcribed Image Text:3.3 A very low earth orbit satellite orbits the earth in 92 minutes and is in darkness
for half of each orbit. The satellite requires 2.5 kW of electrical power, which must
be supplied by batteries when the satelite is in darkness. While the sateMite is in
sunlight, its solar cells must supply sufficiert power to run the satelite and charge
the batteries. Charging the batteries requires 1.25 times the power that is needed
to operate the satellite.
Exercises
115
a. How much power must the solar cells supply while the satellite is in sunlight?
b. The solar cells supply current at 50 V. How much current do they deliver?
c. The satellite is in darkness for 46 minutes of each orbit. What capacity must
the batteries have, in ampere hours?
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