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

*Correct Answer is  B: 70 centimeters and 13 centimeters*  

### AI Response: (may contain errors)  

In the context of amateur radio, space stations refer to satellites or other space-based transmitters that operate on specific frequency bands authorized by the FCC. The question asks which UHF amateur bands are authorized for such space stations.

### Correct Answer: 70 centimeters and 13 centimeters

1. **Why the correct answer is correct:**
   - The 70-centimeter band (420-450 MHz) and the 13-centimeter band (2300-2310 MHz and 2390-2450 MHz) are both authorized for use by amateur space stations. These bands are commonly used for satellite communications due to their favorable propagation characteristics and availability of equipment.

2. **Why the other choices are incorrect:**
   - **Choice A: 70 centimeters only**  
     - This choice is incorrect because it omits the 13-centimeter band, which is also authorized for space station use.
   - **Choice C: 70 centimeters and 33 centimeters**  
     - The 33-centimeter band (902-928 MHz) is not authorized for space station use, making this choice incorrect.
   - **Choice D: 33 centimeters and 13 centimeters**  
     - While the 13-centimeter band is authorized, the 33-centimeter band is not, making this choice incorrect.

### Useful Information:
- **UHF Bands for Space Stations:**  
  - **70 centimeters:** 420-450 MHz
  - **13 centimeters:** 2300-2310 MHz and 2390-2450 MHz

Understanding which frequency bands are authorized for space stations is crucial for ensuring compliance with FCC regulations and for effective communication with amateur satellites.