Why uplink is higher than downlink?

Related questions

1. Can I use GSM SIM in CDMA phone?
2. Is Straight Talk CDMA or GSM?
3. What does CDMA mean on my phone?
4. What is forward link?
5. What's a CDMA network?
6. Do CDMA phones use SIM cards?
7. Does my phone support CDMA?
8. What is a reverse channel?
9. What is a backward link?
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Tags

1. #there
2. #greater
3. #basically
4. #satellites
5. #stations
6. #available
7. #ground
8. #downlink
9. #attenuation
10. #signal
11. #higher
12. #lower
13. #frequency
14. #power
15. #generally
16. #compared
17. #uplink