October 1997

 

Table 9.1: GBES Tracking Pass Summary for October 1997

		no	% lost			Attended	Unattended
pass	% good	op.	total	hardware	software	% recovered	% recoverable	exp	notes
9710031231	99.52							V041a	Elevation jump
9710041406	99.58
9710061629	98.75	*	1	1		99	100		GIL fixed TWT problem
9710071747	96.75								HALCA Ku antenna unwrap
9710081247	85.12		14	1	13	21			Azimuth jumps; ACU stopped
9710101525	97.17								HALCA Ku antenna unwrap
9710110014	5.82	X	94	94			94		Breaks turned on
9710111656	96.38		3	3				V101e	Azimuth jumps
9710121924	72.63	X	27	27			27		Breaks turned on
9710132019	98.61		2	2		>75			Az, El jumps, breaks turned on
9710142143	97.85		2	2					Az, El jumps
9710151541	90.25		9	9		>90			Az, El jumps, breaks turned on
9710161925	93.75		6	6		25			breaks turned on
9710171819	97.97		1	1				V053e1	Az,El jumps; HALCA Ku ant. wrap
9710182003	99.95
9710191437	98.84	X	1	1					Az, El jumps
9710201557	0.00		100	100				V053e2	TWT firmware problems
9710211721	90.79		9		9	91			Computer hung up
9710221835	0.00		100	100				VT824	breaks set; El jumps, TWT problems
9710231959	79.08		20	20		79		VT825	Decoder problems
9710242358	98.91								Elevation jumps
9710251624	99.70								Elevation jumps
9710261749	78.91	X	21	21			21		El jumps; breaks turned on
9710272144	99.12								Elevation jumps
9710282100	85.56		14		13	31			HALCA Ku ant wrap; CPU crashed
9710291509	97.97								HALCA Ku antenna unwrap
9710301703	99.48							V508d	Elevation jumps
9710311751	98.41								El jumps; HALCA ant wrap; breaks on

There was a total of 28 tracking passes in October of 1997 with 5 of these being unattended tracking passes. Of the 23 attended tracking passes 11 collected the maximum amount of valid data possible. Software problems resulted in the loss of data on 3 attended tracking passes while hardware problems resulted in the loss of data on 10 of the attended tracking passes. The operators were able to increase the amount of valid data collected in 7 of the 11 passes were data was lost due to hardware or software problems. Of the unattended tracking passes 0 of 5 obtained the maximum amount of valid data. The presence of an operator at the ``bad'' unattended tracking passes would have increased the amount of good data in 5 of 5 passes.

Of the 7 recording passes, 2 collected the maximum amount of good data while the other recording passes lost 3%, 1%, 100%, 100% and 20% of the data during the pass.

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

$\bullet$ Operators helped increase amount of good data in 7 of 12 ``bad'' attended passes.

$\bullet$ 0 of 5 unattended passes had max good data.

$\bullet$ Operators would have increased amount of good data in 4 of 5 ``bad'' unattended passes.

$\bullet$ A total of 0.35 tracking passes lost data due to software problems.

$\bullet$ A total of 3.88 tracking passes lost data due to hardware problems.

$\bullet$ 2 of 7 recording passes were completely successful.

$\bullet$ A total of 2.24 recording passes lost data.