GOMOS Daily Reports

This report presents the daily analysis on parameters extracted from GOMOS level 1b data (GOM_TRA_1P).
It is intended to monitor some important parameters that will impact the quality of the level 2 products
as the Spectrometers and Photometers CCD Temperatures and Dark Charge, SATU noise equivalent angle...
A list of level 0 products (and content) that have arrived during the actual month to the PCF is also given.

Item	Value
Time of report generation	21DEC2008 05:44:22
Data source version	GOMOS/5.00
Start time of products	18DEC2008 00:03:13
Stop time of products	18DEC2008 02:52:34
Store outputs in DB	Yes
Nb of level 1b prods	49
Nb of prods with errors	1

2. Summary of products arrived in PCF (Product Control Facility)

2.1 Level 0 products arrived in PCF (see template here)

2.2 Plot of mission plan versus Level 0 production arrived in PCF during reporting period

Red segments are missing products.
Blue segments are available products.
Green segments are calibration measurements (not available products to users).

qds_image

2.3 Summary of missing occultations (red segments in previous plot)

UTC start time	Star name	Star ID	Orbit
18-DEC-2008 00:29:40	46GamHya	169	35555
18-DEC-2008 03:50:53	46GamHya	169	35557

2.4 Summary of processed GOM_TRA_1P products

Nr	Filename	UTC Start time	Limb	Duration	Star Id	Star Name	Star Mag	Star Temp	Nb Meas	Orbit	Prod. error
1	GOM_TRA_1PNPDE20081218_000313_000000452074_00431_35555_8996.N1	18-DEC-2008 00:03:13	Bright	44.500	32	77Eps UMa	1.7630	11000.	89	35555	No
2	GOM_TRA_1PNPDE20081218_000553_000000412074_00431_35555_8997.N1	18-DEC-2008 00:05:53	Bright	41.000	39	85Eta UMa	1.8540	24000.	82	35555	No
3	GOM_TRA_1PNPDE20081218_000919_000000472074_00431_35555_8998.N1	18-DEC-2008 00:09:19	Bright	46.500	180	27Gam Boo	3.0400	8000.0	93	35555	No
4	GOM_TRA_1PNPDE20081218_001234_000000372074_00431_35555_8999.N1	18-DEC-2008 00:12:34	Bright	36.500	83		2.3780	11000.	73	35555	No
5	GOM_TRA_1PNPDE20081218_001559_000000422074_00431_35555_9000.N1	18-DEC-2008 00:15:59	Bright	42.000	111	8Eta Boo	2.6800	6000.0	84	35555	No
6	GOM_TRA_1PNPDE20081218_002609_000000552074_00431_35555_9128.N1	18-DEC-2008 00:26:09	Twi_and_stray	55.000	15	67Alp Vir	0.97600	28000.	110	35555	Yes
7	GOM_TRA_1PNPDE20081218_003220_000000562074_00431_35555_9129.N1	18-DEC-2008 00:32:20	Dark	55.500	106	9Bet Crv	2.6480	5600.0	111	35555	No
8	GOM_TRA_1PNPDE20081218_003655_000000412074_00431_35555_9130.N1	18-DEC-2008 00:36:55	Dark	41.000	64	Gam Cen	2.2000	10600.	82	35555	No
9	GOM_TRA_1PNPDE20081218_003835_000000432074_00432_35556_9131.N1	18-DEC-2008 00:38:35	Dark	42.500	99	Del Cen	2.5750	26000.	85	35556	No
10	GOM_TRA_1PNPDE20081218_004232_000000462074_00432_35556_9132.N1	18-DEC-2008 00:42:32	Dark	45.500	113	Mu Vel	2.6920	5000.0	91	35556	No
11	GOM_TRA_1PNPDE20081218_004446_000000392074_00432_35556_9133.N1	18-DEC-2008 00:44:46	Dark	39.000	159	Ups Car	2.9200	7200.0	78	35556	No
12	GOM_TRA_1PNPDE20081218_004611_000000402074_00432_35556_9134.N1	18-DEC-2008 00:46:11	Dark	40.000	71	Iot Car	2.2460	7700.0	80	35556	No
13	GOM_TRA_1PNPDE20081218_005053_000000452074_00432_35556_9135.N1	18-DEC-2008 00:50:53	Dark	45.000	34	Gam2Vel	1.7930	23000.	90	35556	No
14	GOM_TRA_1PNPDE20081218_005302_000000532074_00432_35556_9136.N1	18-DEC-2008 00:53:02	Dark	52.500	70	Zet Pup	2.2460	39000.	105	35556	No
15	GOM_TRA_1PNPDE20081218_005539_000000502074_00432_35556_9137.N1	18-DEC-2008 00:55:39	Dark	50.000	117	Pi Pup	2.7060	3800.0	100	35556	No
16	GOM_TRA_1PNPDE20081218_005850_000000522074_00432_35556_9138.N1	18-DEC-2008 00:58:50	Straylight	52.000	23	21Eps CMa	1.5020	26000.	104	35556	No
17	GOM_TRA_1PNPDE20081218_010036_000000362074_00432_35556_9139.N1	18-DEC-2008 01:00:36	Straylight	36.000	179	24Omi2CMa	3.0320	24000.	72	35556	No
18	GOM_TRA_1PNPDE20081218_010316_000000512074_00432_35556_9140.N1	18-DEC-2008 01:03:16	Straylight	50.500	47	2Bet CMa	1.9760	28000.	101	35556	No
19	GOM_TRA_1PNPDE20081218_010645_000000462074_00432_35556_9141.N1	18-DEC-2008 01:06:45	Straylight	46.000	7	19Bet Ori	0.10000	14000.	92	35556	No
20	GOM_TRA_1PNPDE20081218_010856_000000452074_00432_35556_9142.N1	18-DEC-2008 01:08:56	Straylight	45.000	30	46Eps Ori	1.6940	30000.	90	35556	No
21	GOM_TRA_1PNPDE20081218_011158_000000642074_00432_35556_9143.N1	18-DEC-2008 01:11:58	Twi_and_stray	64.000	14	58Alp Ori	0.87000	3000.0	128	35556	No
22	GOM_TRA_1PNPDE20081218_011402_000000492074_00432_35556_9144.N1	18-DEC-2008 01:14:02	Twi_and_stray	49.000	13	87Alp Tau	0.86700	3800.0	98	35556	No
23	GOM_TRA_1PNPDE20081218_011607_000000442074_00432_35556_9145.N1	18-DEC-2008 01:16:07	Bright	43.500	176	23Zet Tau	3.0200	22000.	87	35556	No
24	GOM_TRA_1PNPDE20081218_011810_000000432074_00432_35556_9146.N1	18-DEC-2008 01:18:10	Bright	42.500	28	12Bet Tau	1.6500	15200.	85	35556	No
25	GOM_TRA_1PNPDE20081218_012139_000000432074_00432_35556_9147.N1	18-DEC-2008 01:21:39	Bright	43.000	107	37The Aur	2.6490	11000.	86	35556	No
26	GOM_TRA_1PNPDE20081218_012351_000000412074_00432_35556_9148.N1	18-DEC-2008 01:23:51	Bright	41.000	42	34Bet Aur	1.9000	10200.	82	35556	No
27	GOM_TRA_1PNPDE20081218_013918_000000372074_00432_35556_9149.N1	18-DEC-2008 01:39:18	Bright	37.000	60	7Bet UMi	2.0810	3950.0	74	35556	No
28	GOM_TRA_1PNPDE20081218_014349_000000432074_00432_35556_9150.N1	18-DEC-2008 01:43:49	Bright	42.500	32	77Eps UMa	1.7630	11000.	85	35556	No
29	GOM_TRA_1PNPDE20081218_014629_000000392074_00432_35556_9151.N1	18-DEC-2008 01:46:29	Bright	38.500	39	85Eta UMa	1.8540	24000.	77	35556	No
30	GOM_TRA_1PNPDE20081218_014955_000000372074_00432_35556_9152.N1	18-DEC-2008 01:49:55	Bright	37.000	180	27Gam Boo	3.0400	8000.0	74	35556	No
31	GOM_TRA_1PNPDE20081218_015310_000000382074_00432_35556_9153.N1	18-DEC-2008 01:53:10	Bright	38.000	83		2.3780	11000.	76	35556	No
32	GOM_TRA_1PNPDE20081218_015635_000000412074_00432_35556_9154.N1	18-DEC-2008 01:56:35	Bright	40.500	111	8Eta Boo	2.6800	6000.0	81	35556	No
33	GOM_TRA_1PNPDE20081218_020646_000000532074_00432_35556_9268.N1	18-DEC-2008 02:06:46	Twi_and_stray	52.500	15	67Alp Vir	0.97600	28000.	105	35556	No
34	GOM_TRA_1PNPDE20081218_021016_000000432074_00432_35556_9269.N1	18-DEC-2008 02:10:16	Dark	43.000	169	46Gam Hya	2.9910	4700.0	86	35556	No
35	GOM_TRA_1PNPDE20081218_021258_000000572074_00432_35556_9270.N1	18-DEC-2008 02:12:58	Dark	57.000	106	9Bet Crv	2.6480	5600.0	114	35556	No
36	GOM_TRA_1PNPDE20081218_021732_000000422074_00432_35556_9271.N1	18-DEC-2008 02:17:32	Dark	41.500	64	Gam Cen	2.2000	10600.	83	35556	No
37	GOM_TRA_1PNPDE20081218_021912_000000402074_00433_35557_9272.N1	18-DEC-2008 02:19:12	Dark	40.000	99	Del Cen	2.5750	26000.	80	35557	No
38	GOM_TRA_1PNPDE20081218_022309_000000492074_00433_35557_9273.N1	18-DEC-2008 02:23:09	Dark	48.500	113	Mu Vel	2.6920	5000.0	97	35557	No
39	GOM_TRA_1PNPDE20081218_022522_000000392074_00433_35557_9274.N1	18-DEC-2008 02:25:22	Dark	39.000	159	Ups Car	2.9200	7200.0	78	35557	No
40	GOM_TRA_1PNPDE20081218_022647_000000412074_00433_35557_9275.N1	18-DEC-2008 02:26:47	Dark	40.500	71	Iot Car	2.2460	7700.0	81	35557	No
41	GOM_TRA_1PNPDE20081218_023130_000000462074_00433_35557_9276.N1	18-DEC-2008 02:31:30	Dark	45.500	34	Gam2Vel	1.7930	23000.	91	35557	No
42	GOM_TRA_1PNPDE20081218_023339_000000502074_00433_35557_9277.N1	18-DEC-2008 02:33:39	Dark	49.500	70	Zet Pup	2.2460	39000.	99	35557	No
43	GOM_TRA_1PNPDE20081218_023616_000000502074_00433_35557_9278.N1	18-DEC-2008 02:36:16	Dark	49.500	117	Pi Pup	2.7060	3800.0	99	35557	No
44	GOM_TRA_1PNPDE20081218_023927_000000532074_00433_35557_9279.N1	18-DEC-2008 02:39:27	Straylight	53.000	23	21Eps CMa	1.5020	26000.	106	35557	No
45	GOM_TRA_1PNPDE20081218_024112_000000362074_00433_35557_9280.N1	18-DEC-2008 02:41:12	Straylight	36.000	179	24Omi2CMa	3.0320	24000.	72	35557	No
46	GOM_TRA_1PNPDE20081218_024352_000000512074_00433_35557_9281.N1	18-DEC-2008 02:43:52	Straylight	50.500	47	2Bet CMa	1.9760	28000.	101	35557	No
47	GOM_TRA_1PNPDE20081218_024721_000000502074_00433_35557_9282.N1	18-DEC-2008 02:47:21	Straylight	50.000	7	19Bet Ori	0.10000	14000.	100	35557	No
48	GOM_TRA_1PNPDE20081218_024932_000000462074_00433_35557_9283.N1	18-DEC-2008 02:49:32	Straylight	45.500	30	46Eps Ori	1.6940	30000.	91	35557	No
49	GOM_TRA_1PNPDE20081218_025234_000000592074_00433_35557_9284.N1	18-DEC-2008 02:52:34	Twi_and_stray	59.000	14	58Alp Ori	0.87000	3000.0	118	35557	No

3. Plot of GOMOS spectrometers and photometers temperatures from level 1b data

qds_image

4. Overview of dark signal processing per product

The Dark Charge (DC) is a temperature-dependant signal added to the useful measurements and it is therefore substracted
from them during the processing. There are two phenomena that produce a continuous increase of the DC: the "hot pixels"
(a pixel is "hot" when its DC exceeds by a significant amount its value measured on ground at the same temperature) and
the "Random Telegraphic Signal" (abrupt change positive or negative of the CCD pixel signal, random in time, affecting
only the DC part of the signal and not the photon generated signal).
In this section a list of products that did not use the Dark Sky Area (DSA) observation for the DC computation is given.
It is also provided the mean DC plot per product for dark limb products with no error flag set.

4.1 All products used the DSA observation for the DC computation

4.2 Plot of mean dark charges per product: only products in DARK limb conditions without errors are used

5. Demodulation flag and quality information monitoring

In this section it is presented the modulation information extracted from the pcd (product confidence data)
at measurement level and information extracted from the Quality Summary dataset. Only products without errors
(error flag in the MPH set to "0") are used.

5.1 Percentage of products during reporting period with:


At least one measurement with demodulation flag set:	39.5833 %
Reference spectrum computed from DB:	0.00000 %
Reference spectrum with small number of measurements:	0.00000 %
SATU data not used:	0.00000 %

5.2 Plot quality information per product (time dependant)

5.3 Plot quality information per product (world map)

6. Statistics and plot of tangent altitude of the last measurement (DARK & BRIGHT products without errors)

6.1 Statistics on tangent altitude lost:

Statistics	DARK	BRIGHT	TWILIGHT
Mean:	17.799	20.230	NaN
St. deviation:	2.2754	3.3169	NaN
Maximum:	21.060	24.085	NaN
Minimum:	13.491	10.781	NaN
Number of data:	19.000	15.000	NaN

6.2 Plot for DARK limb products

6.3 Plot for BRIGHT limb products

7. Star Acquisition and Tracking Unit (SATU)

The Star Acquisition and Tracking Unit (SATU) analyses the position of the tracked star beam collected by
the GOMOS telescope and deflected by the optical beam dispatcher. The main functin of the SATU is to detect
a star, provide its image position to the science data electronics and to help the pointing function to keep
the star image at a fixed position. In tracking mode the SATU data is recorded with a frecuency of 100 Hz.

7.1 SATU 'X' and 'Y' axis plots (dark limb)

SATU CCD 'X' and 'Y' axis plots are provided in order to detect any abnormal behaviour of the tracking system.
For every occultation (color) the plot should remain stable (with some noise) until we are deep in the atmosphere
where big fluctuations are registered due to the refractive effects.

qds_image

7.2 Statistics on SATU Noise Equivalent Angle (NEA) for DARK (D) and BRIGHT (B) products above 105 kms

The Star Acquisition and Tracking Unit (it is the CCD that tracks the star while it is occulted) Noise Equivalent
Angle consists of the statistical angular variation of the SATU data above the atmosphere.
Statistics (in microradians) above 105 km are computed for every occultation, giving four values per occultation: one in the 'X'
direction and one in the 'Y' direction for dark and bright limbs. A mean value per day in every direction and limb
is calculated and monitored in order to assess instrument performance in terms of star pointing.

7.2.1 SATU NEA Statistics (table)

Statistics	SATU X (D)	SATU Y (D)	SATU X (B)	SATU Y (B)
Mean:	0.25929	-1.2679	0.19994	-1.2742
St. deviation:	0.70965	1.3307	0.89861	1.3943
Maximum:	8.7000	8.6000	5.8000	5.7000
Minimum:	-8.3000	-14.300	-5.3000	-8.8000
Number of data:	19750.	19750.	13950.	13950.

7.2.2 Trend of daily SATU NEA St. deviation since 1st April 2006 (dark limb)

The long term trend of the SATU 'X' and 'Y' standard deviations should be constant during the whole mission.

The colorbar represents the start tangent altitude (km) of the occultations.

Upper curve: STD of SATU Y axis
Lower curve: STD of SATU X axis

qds_image

8. Auxiliary Data Files used for the production reported in section 2.4

The number reported in the third column indicates since which file (see list in section 2.4) the corresponding
auxiliary file has been used. The fourth column is the date of those product files.

Type	Auxiliary Filename	Used since product	Used since product date
INST_PHYS_CHARACTERISTICS	GOM_INS_AXNIEC20050627_150713_20030716_120000_20100101_000000	1	18-DEC-2008 00:03:13
CALIBRATION_DATABASE	GOM_CAL_AXVIEC20081202_144804_20081130_000000_20100101_000000	1	18-DEC-2008 00:03:13
LEVEL-1B_PROC_CONFIG	GOM_PR1_AXNIEC20050627_151042_20020301_000000_20100101_000000	1	18-DEC-2008 00:03:13
STAR_CATALOGUE	GOM_CAT_AXVIEC20020121_161009_20020101_000000_20200101_000000	1	18-DEC-2008 00:03:13
STELLAR_SPECTRA_DATABANK	GOM_STS_AXNIEC20040308_103538_20020101_160000_20100101_000000	1	18-DEC-2008 00:03:13
ECMWF_FILE	AUX_ECF_AXNECM20081217_072112_20081217_210000_20081218_090000	1	18-DEC-2008 00:03:13
OPTIONAL_ECMWF_FILE	MISSING	1	18-DEC-2008 00:03:13
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20081217_205526_000060572074_00429_35553_6981.N1	1	18-DEC-2008 00:03:13
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20081217_224142_000057382074_00430_35554_6982.N1	6	18-DEC-2008 00:26:09
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20081218_002239_000054192074_00431_35555_6983.N1	33	18-DEC-2008 02:06:46

Reports

Daily Report Level 2 Dataset IPF v6.01

Daily Reports of NRT data

Data Anomaly Reports

Instrument Anomaly Reports

Monthly Reports

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Last modified:
24-Apr-2008