December 1997

 

Table 13.1: GBES Tracking Pass Summary for December 1997

		no	% lost			Attended	Unattended
pass	% good	op.	total	hardware	software	% recovered	% recoverable	exp	notes
9712011427	68.09		21	21		68		VS07b	TWT/Decoder problems
9712021803	99.73
9712031040	89.82							VS03j	HALCA downlink antenna unwrap
9712031933	99.85
9712041159	93.77							V003b
9712051342	99.81
9712061641	79.91	X	20		20		>90		Decoder problem, GIL fixed
9712071803	99.46	X
9712081055	95.84	X							HALCA downlink antenna unwrap
9712081803	96.37							V138d	HALCA downlink antenna unwrap
9712091837	0.00		100	50				VS05j	ICE storm, TWT late in GBES
9712101336	0.00		100	100				V029a	TWT problem
9712101559	33.86		67					V029a	TWT problem
9712111727	99.84							V029l
9712121733	99.92							V004b1
9712141235	99.27	X
9712151453	97.12		2		2	97			Antenna ACU problem at start
9712171627	99.27							VS05s
9712181746	99.55							V050j
9712201404	99.24							V081b
9712211523	98.93							V035a1	HALCA downlink antenna unwrap
9712211753	99.02
9712221642	96.53		3			$\sim25$		V067b1	ICE storm,pointing
9712241325	65.89	X	34	34			>90		transmitter no lock, AHM fixed
9712261539	0.00	X	100	100			>90		transmitter not locking
9712291402	99.59

There was a total of 26 tracking passes in December of 1997 with 6 of these being unattended tracking passes. Of the 20 attended tracking passes 14 collected the maximum amount of valid data possible. Software problems resulted in the loss of data on 1 attended tracking passes while hardware problems resulted in the loss of data on 4 of the attended tracking passes. The operators were able to increase the amount of valid data collected in 3 of the 6 passes were data was lost due to hardware or software problems. Of the unattended tracking passes 3 of 6 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 3 of 3 passes.

Of the 14 recording passes, 8 collected the maximum amount of good data while the other recording passes lost 21%, 100%, 100%, 67% and 3% of the data during the pass. Two of the recording passes lost data due to inclement weather.

$\bullet$ 14 of 20 attended passes had max good data.

$\bullet$ Operators helped increase amount of good data in 3 of 6 ``bad'' attended passes.

$\bullet$ 3 of 6 unattended passes had max good data.

$\bullet$ Operators would have increased amount of good data in 3 of 3 ``bad'' unattended passes.

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

$\bullet$ A total of 3.72 tracking passes lost data due to hardware problems.

$\bullet$ Inclement weather resulted in the loss of 0.53 tracking passes.

$\bullet$ 8 of 14 recording passes were completely successful.

$\bullet$ A total of 2.91 recording passes lost data.