Re: 80-008B tumbling? plus a couple of other items

Alan Pickup (alan@wingar.demon.co.uk)
Sun, 23 Mar 1997 23:00:33 +0000

In message <199703232018.VAA16715@mail.be.innet.net>, Tristan Cools
<tcools@nic.INbe.net> writes
>>Using King-Hele's definitions, Lifetime = Q/ndot
>>
>>Elsets give you ndot2 which is half ndot, so Lifetime = Q/(2*ndot2)
>...
>I do not possess that graph of King-Hele.  Can someone (Alan, Bjorn) give us
>some Q-values for changing mean motions and exentricities ?

Here are a few values for Q read from K-H's graphs. 

          ------Eccentricity---------
MM        0.0     0.01    0.02   0.03

15.0  Q=  0.164   0.201   0.275  0.377

15.8  Q=  0.145   0.182   0.260  0.362

16.0  Q=  0.129   0.166   0.250

16.2  Q=  0.104   0.143

16.4  Q=  0.067

These are for conditions of low solar activity (F10.7 = 80). For high
solar activity (F10.7 = 150), the Q for (e=0.0,MM=15.0) increases to
0.217 and that for (e=0.03,MM=15.0) to 0.397, while the value for
(e=0.0,MM=16.4) is unchanged.

Alan
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