The rover uses 4GHz frequency to transmit the picture. The rover’s transmission power is 200W. The transmission antenna gain is 10,000 and the receiving antenna gain is 100,000. What is the received signal strength at the Earth’s station, in W (assume Pi = 3.14)?

A rover uses 4GHz frequency to transmit a picture. The rover’s transmission power is 200W. Distance = 55*10^9m. The transmission antenna gain is 10,000 and the receiving antenna gain is 100,000. What is the received signal strength at the Earth’s station, in W (assume Pi = 3.14)?

= 31.5 db

Explanation:

Path loss = 20㏒₁₀(4πdf / c)

               = 20㏒₁₀(d) + 20㏒₁₀(f) - 20㏒₁₀(4π / c)

               = 20㏒₁₀(55 × 10⁹) + 20㏒₁₀(4000) - 147.5

               = (20 × 77.4) + 20 ×  3.6 - 147.5

               = 154 + 72 - 147.5

               = 78.5 DB

Received signal strength(power)

Pr = Pt + Gt + Gr - Lp dBW

= 20 + 40 + 50 - 78.5

= 31.5 db

the focus of lesson 1 is newton's first law of motion - sometimes referred to as the law of inertia. newton's first law of motion is often stated as. an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

explanation:

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27