Question E1D09:
[97.207] Which UHF amateur bands have frequencies authorized for space stations?  

Choices:  
A: 70 centimeters only  
B: 70 centimeters and 13 centimeters  
C: 70 centimeters and 33 centimeters  
D: 33 centimeters and 13 centimeters    

Correct Answer is  B: 70 centimeters and 13 centimeters  

Correct answer: 70 centimeters and 13 centimeters.

Why it’s correct:
- FCC Part 97.207 authorizes amateur space stations (amateur-satellite service) on specific UHF segments, including:
  - 70 cm: 435–438 MHz
  - 13 cm: 2400–2450 MHz
- Therefore, both the 70 cm and 13 cm amateur bands have frequencies authorized for space stations.

Why the other choices are incorrect:
- A: 70 centimeters only — incomplete; 13 cm also has authorized satellite allocations.
- C: 70 centimeters and 33 centimeters — 33 cm (902–928 MHz) has no amateur-satellite allocation.
- D: 33 centimeters and 13 centimeters — omits 70 cm, which is a primary amateur-satellite segment (435–438 MHz).

Useful rules of thumb:
- UHF range is $300\ \text{MHz}$ to $3\ \text{GHz}$.
- Common amateur-satellite UHF segments to remember:
  - $70\ \text{cm}$: $435$–$438\ \text{MHz}$
  - $13\ \text{cm}$: $2400$–$2450\ \text{MHz}$
- Quick wavelength–frequency relation for band names:
  $$\lambda\ (\text{meters}) = \frac{300}{f\ (\text{MHz})}$$
  Example: $f=2400\ \text{MHz} \Rightarrow \lambda \approx 0.125\ \text{m} = 12.5\ \text{cm}$ (the “13 cm” band).