September 1997

 

Table 7.1: GBES Tracking Pass Summary for September 1997

		no	% lost			Attended	Unattended
pass	% good	op.	total	hardware	software	% recovered	% recoverable	exp	notes
9709011434	99.64	X
9709021642	99.93
9709032032	0.00		100						No signal from HALCA
9709051342	97.35		2	2				VT820	Azimuth jumps
9709061457	99.93							VT821
9709071733	99.51	X
9709082118	0.00		100	?	?				Costas never locked
9709092005	99.54								HALCA signal late
9709101344	90.47		9		9	90			Decoder got stuck
9709111508	0.00		100	100					TWT problem
9709121830	99.81
9709132156	99.75	X
9709142027	93.18		6		6	93		V047r	ACU problem - ant. not moving
9709151419	99.29	X
9709152032	99.04							V047k
9709161533	99.17								Azimuth jumps
9709171652	90.92		9	9				V041d	Azimuth jumps
9709182227	96.33		3	3					Azimuth, Elevation jumps
9709191303	97.99		2	2					Azimuth jumps
9709201418	97.57								Azimuth jumps, HALCA ant wrap
9709202049	29.60		70	65	5	29			ACU stopped, HALCA Ku ant. wrap
9709211659	37.31		62	62		37			Demodulator problems
9709230000	97.43	X							Very short pass
9709232028	96.06		3	1	2	96			Computer hung-up, Azimuth jumps
9709251439	95.21		4	4				V022c	Azimuth jumps
9709261732	99.79								Azimuth jumps
9709272112	99.69
9709282038	99.56	X							Azimuth jumps
9709302222	0.00		100						HALCA not commanded

There was a total of 29 tracking passes in September of 1997 with 6 of these being unattended tracking passes. There were 2 tracking passes that lost data due to problems with HALCA or the schedule file (SRT file). Of the 23 attended tracking passes 11 collected the maximum amount of valid data possible. Software problems resulted in the loss of data on 4 attended tracking passes while hardware problems resulted in the loss of data on 9 of the attended tracking passes. Two passes lost data due to both hardware and software problems. The operators were able to increase the amount of valid data collected in 5 of the 12 passes were data was lost due to hardware or software problems. Of the unattended tracking passes 6 of 6 obtained the maximum amount of valid data.

Of the 6 recording passes, 2 collected the maximum amount of good data while the other recording passes lost 2%, 6%, 9% and 4% of the data during the passes.

$\bullet$ 11 of 23 attended passes had max good data.

$\bullet$ Operators helped increase amount of good data in 5 of 12 ``bad'' attended passes.

$\bullet$ 6 of 6 unattended passes had max good data.

$\bullet$ A total of 0.22 tracking passes lost data due to software problems.

$\bullet$ A total of 2.48 tracking passes lost data due to hardware problems.

$\bullet$ A total of 1.00 tracking passes lost data due to problems with HALCA.

$\bullet$ 2 of 6 recording passes were completely successful.

$\bullet$ A total of 0.21 recording passes lost data.