( 1) ? (2)

Establish a physical model as shown in the figure.

(1) Right "Resource Satellite"

①

? ②

Solution:? ③

(2) If A is the "Tianlian-1" satellite and A is the earth tangent AB and AC, then the optimal arc corresponding to ∠COB is the measurement and control range.

With o as the vertical line, OE and OD are as shown in the figure, then

Through geometry knowledge are:

④

⑤

So ⑥

Measurement and control time ⑦

Establish a physical model as shown in the figure.

(1) Right "Resource Satellite"

①

? ②

Solution:? ③

(2) If A is the "Tianlian-1" satellite and A is the earth tangent AB and AC, then the optimal arc corresponding to ∠COB is the measurement and control range.

With o as the vertical line, OE and OD are as shown in the figure, then

Through geometry knowledge are:

④

⑤

So ⑥

Measurement and control time ⑦

? ⑧

Scoring standard: the full mark of this question is 20, in which (1) is 8, ① is 4, ② is 2, (2) is 12, ④ is 3, and ⑦ is 2.

⑧

Scoring standard: the full mark of this question is 20, in which (1) is 8, ① is 4, ② is 2, (2) is 12, ④ is 3, and ⑦ is 2.