Finding USA 116

From: Bjoern Gimle (b_gimle@algonet.se)
Date: Mon Dec 18 2000 - 10:22:26 PST

• Next message: Paul Gabriel: "obs 18 dec 00353.02"

```USA 116 is usually manoeuvred on its perigee pass about three hours =
after the USA 129 manoeuvre.
Its mean motion is adjusted to about 0.005 to 0.01 higher than USA =
129's, but the difference will be reduced to its negative counterpart in =
a few months time, because of USA 116's lower drag.

Around Nov.29.878 USA 129 went into its higher orbit:
USA 129 334.879 after manoeuvre ?
1 24680E 96072A     334.87900000  .00036489  00000-0  52143-3 0    10
2 24680  97.8663  35.0543 0513323 159.0563   0.2544 14.74593739 -1275

USA 116 search orbit:
USA 116 +13 m/s Manoeuvre?
1 70061E 95066A   00334.96860000  .00020235  00000-0  45899-3 0    22
2 70061  97.9527  83.7704 0458414  11.7970 359.8537 14.75449079  1082

However, on Nov.29 the time (and ground track longitude) separation from =
USA 116 was larger (02:48) than usual, so it is possible USA 116 was =
allowed to stay a day or two more in the low orbit, to let USA 129 =
reduce this difference:
USA 116 335.99 +13 m/s Manoeuvre?
1 70062E 95066A   00334.96240000  .00020235  00000-0  45899-3 0    22
2 70062  97.9527  83.7704 0458414  11.7970 359.8537 14.75449079  1082

Also, three weeks have passed, adding to the normal uncertainty, so here =
is a later pass:
USA 116 +13.5 manoeuvre?
1 70063E 95066A   00334.96860000  .00020235  00000-0  45899-3 0    22
2 70063  97.9527  83.7704 0459740  11.7966 359.8541 14.75141254  1089

However, I believe more in the early orbit, 70062 ( or a 14.757 MM =
variant of 70061)

From Dec.22 USA 116 may reach 11 degrees above the S horizon for Tony =
Beresford, a week later for Greg Roberts. I wish them the best of luck !

Is any observer living further south?

(Recent USA 129 elset from Ted Molczan:
USA 129         15.0  3.0  0.0  5.1 v
1 24680U 96072A   00343.53368056  .00036489  00000-0  52143-3 0    01
2 24680  97.8663  43.5071 0510901 130.5425 234.1458 14.75220221    00
)

-- bjorn.gimle@tietotech.se (office)                         --
-- b_gimle@algonet.se (home)  http://www.algonet.se/~b_gimle --
-- COSPAR 5919, MALMA,    59.2576 N, 18.6172 E, 23 m         --
-- COSPAR 5918, HAMMARBY, 59.2985 N, 18.1045 E, 44 m         --
-- SeeSat-L searching now available (URL at the last line)   --

-----------------------------------------------------------------
Unsubscribe from SeeSat-L by sending a message with 'unsubscribe'
in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org
http://www2.satellite.eu.org/seesat/seesatindex.html
```

This archive was generated by hypermail 2b29 : Mon Dec 18 2000 - 10:26:19 PST