C.1 Summary of Uplink Changes

This appendix gives details of any changes to the uplink software used to control the instrument. A list of changes is given in Table C.1 with a more complete explanation given below.

Table C.1: SWS uplink history

Uplink	Revolution	SPR/SCREW	Comment
system
21.3	36+	SPR 1383	band 3 bias reduced from setting 4 to 2.
21.5	40+	-	more accurate wavelengths in uplink tables.
21.6	44+	-	more accurate wavelengths in uplink tables.
22.0	60+	SCREW 116	uplink time overhead reduced.
22.3	64+	SCREW 144	exact match of up and down scans in SWS01.
		SCREW 145	more precise control of the run flags at the end of a down scan.
		-	improved system sensitivities and noise parameters.
		-	scan ranges in SWS01 adjusted.
		-	less frequent photometric checks.
		-	hi-level photometric checks no longer used.
		-	3E transition moved from 28 to 27.5.
22.6	71+	-	intervals between photo checks increased.
		-	intervals between ref scans increased.
		-	scan lengths in AOT1 50 instead of 40 steps.
23.1	71+	-	better FP gap calibration.
??	78+	-	band 3 bias reduced to setting 1.
23.7	101+	SCREW 169	dark currents measured in activation.
24.0	103+	SCREW 162	maximum reset of 4 seconds allowed for band 1.
		SCREW 163	longer darks in SWS01.
		SCREW 164	disabling of reference scans in AOTs 6 and 7.
		SCREW 165	wavelength-dependent FP gap width.
		SCREW 166	FP scan repetition rate minimally 3.
		SCREW 167	avoid breaking up short FP-scans.
25.1	150+	SPR 1689	more accurate FP control table.
		SPR 1691	more ref scans for band 3.
28.0	191+	SCREW 188	grating tracking also for short FP scans.
		SCREW 189	further suppression of unnecessary ref scans in SWS07
		SCREW 190	make sure that all scans are followed by
			proper dark measurements.
		SCREW 191	delay photo checks as much as possible within the AOTs.
		SPR 1548	improved FP velocity correction.
		SPR 1787	band 1 edge moved from 4.05 to 4.08 $\mu$m.
29.0	161, 237+	SCREW 187	acknowledge misalignment of bands 6 and 4.
30.0	336+	SCREW 232	replace very slow scans in AOTs 6 and 7 by
			repeated faster scans.
33.2	584, 590+	SPR 2307	ref scans in AOTs 6 and 7 finally disabled.