May 1998

 

Table 23.1: GBES Tracking Pass Summary for May 1998

		no	% lost			Attended	Unattended
pass	% good	op.	total	hardware	software	% recovered	% recoverable	exp	notes
9805010954	99.59							V012a	phase jumps
9805021112	97.32		2	2?	2?	97		V029a3	phase jump
9805031403	99.83
9805040745	99.65								phase jumps
9805041533	95.47		4	4					pht jumps, twt locked up at start
9805050846	98.96							V008c	phase jumps
9805061004	0.00		100					V008c	HALCA downlink pointing problem
9805062038	92.28								phase jumps, HALCA ant. wrap
9805071346	0.00		100					V032a	HALCA Ku ADP not working
9805081255	58.63		41					V097a	HALCA late on GB
9805090738	99.17	X
9805090932	87.14	X	12	12?			12?		no downlink first 10 min, ant. motor?
9805101203	50.84		49	49		49			antenna stuck in limit, oscillations, motor
9805140749	99.45
9805141612	99.61							VS01v
9805150907	99.44								phase jumps
9805151858	99.82							VT838
9805180641	96.24		3						HALCA commanded to GB 3 min. late
9805180911	99.87
9805191026	88.33		11	11					antenna pointing problem
9805200917	99.48								phase glitches
9805211035	99.40								phase glitches
9805220616	83.93		16	16?	16?				no lock 1st 30 min, costas lock bit?
9805230651	99.63								phase glitch
9805240810	99.54							V085u	phase glitch, heavy rain
9805250927	99.12							V019b	phase glitches
9805261045	97.66		2		2				late on src (test software, wrong cmd)
9805290820	0.00		100					V123a2	HALCA not commanded

There was a total of 28 tracking passes in May of 1998 with 2 of these being unattended tracking passes. Of the 26 attended tracking passes 20 collected the maximum amount of valid data possible. Of the 2 unattended tracking passes one collected the maximum amount of good data. There were 5 tracking passes that lost data due to problems on HALCA.

Of the 11 recording passes, 10 collected the maximum amount of good data while the other recording pass lost 2% of the data during the pass.

$\bullet$ 20 of 26 attended passes had max good data.

$\bullet$ Operators helped increase amount of good data in 2 of 6 ``bad'' attended passes.

$\bullet$ 1 of 2 unattended passes had max good data.

$\bullet$ Operators would have increased amount of good data in 1 of 1 ``bad'' unatt ended passes.

$\bullet$ A total of 3.44 tracking passes lost data due to problems with HALCA.

$\bullet$ A total of 0.02 tracking passes lost data due to software problems.

$\bullet$ A total of 0.60 tracking passes lost data due to hardware problems.

$\bullet$ 10 of 11 recording passes were completely successful.

$\bullet$ A total of 0.02 recording passes lost data.