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	12SEP2008 05:39:42
Data source version	GOMOS/5.00
Start time of products	10SEP2008 00:05:39
Stop time of products	10SEP2008 04:59:44
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
10-SEP-2008 00:44:17	1ZetCMa	177	34138
10-SEP-2008 02:22:45	21EpsCMa	23	34139
10-SEP-2008 02:24:53	1ZetCMa	177	34139
10-SEP-2008 15:04:54	11BetCas	74	34147
10-SEP-2008 22:32:16	1ZetCMa	177	34151

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_1PNPDE20080910_000539_000000362072_00016_34138_6804.N1	10-SEP-2008 00:05:39	Bright	36.000	49	1Alp UMi	1.9900	6300.0	72	34138	No
2	GOM_TRA_1PNPDE20080910_002257_000000412072_00016_34138_6805.N1	10-SEP-2008 00:22:57	Bright	41.000	24	66Alp Gem	1.5800	10200.	82	34138	No
3	GOM_TRA_1PNPDE20080910_003110_000000482072_00016_34138_6806.N1	10-SEP-2008 00:31:10	Twilight	48.000	8	10Alp CMi	0.40000	6500.0	96	34138	No
4	GOM_TRA_1PNPDE20080910_003938_000000572072_00016_34138_6940.N1	10-SEP-2008 00:39:38	Dark	56.500	1	9Alp CMa	-1.4400	11000.	113	34138	No
5	GOM_TRA_1PNPDE20080910_004206_000000492072_00016_34138_6941.N1	10-SEP-2008 00:42:06	Dark	48.500	23	21Eps CMa	1.5020	26000.	97	34138	No
6	GOM_TRA_1PNPDE20080910_004722_000000402072_00016_34138_6942.N1	10-SEP-2008 00:47:22	Dark	39.500	161	Tau Pup	2.9310	4500.0	79	34138	No
7	GOM_TRA_1PNPDE20080910_004837_000000542072_00016_34138_6943.N1	10-SEP-2008 00:48:37	Dark	54.000	2	Alp Car	-0.73600	7000.0	108	34138	No
8	GOM_TRA_1PNPDE20080910_005900_000000402072_00017_34139_6944.N1	10-SEP-2008 00:59:00	Dark	39.500	143	Alp Hyi	2.8570	7200.0	79	34139	No
9	GOM_TRA_1PNPDE20080910_010023_000000532072_00017_34139_6945.N1	10-SEP-2008 01:00:23	Dark	53.000	9	Alp Eri	0.45300	24000.	106	34139	No
10	GOM_TRA_1PNPDE20080910_010710_000000462072_00017_34139_6946.N1	10-SEP-2008 01:07:10	Straylight	46.000	63	Bet Gru	2.1500	2800.0	92	34139	No
11	GOM_TRA_1PNPDE20080910_011145_000000452072_00017_34139_6947.N1	10-SEP-2008 01:11:45	Straylight	45.000	18	24Alp PsA	1.1660	9700.0	90	34139	No
12	GOM_TRA_1PNPDE20080910_012040_000000372072_00017_34139_6948.N1	10-SEP-2008 01:20:40	Bright	36.500	162	34Alp Aqr	2.9440	5350.0	73	34139	No
13	GOM_TRA_1PNPDE20080910_012339_000000372072_00017_34139_6949.N1	10-SEP-2008 01:23:39	Bright	37.000	61	8Eps Peg	2.1000	3900.0	74	34139	No
14	GOM_TRA_1PNPDE20080910_012539_000000432072_00017_34139_6950.N1	10-SEP-2008 01:25:39	Bright	42.500	90	54Alp Peg	2.4870	11000.	85	34139	No
15	GOM_TRA_1PNPDE20080910_012954_000000392072_00017_34139_6951.N1	10-SEP-2008 01:29:54	Bright	38.500	164	44Eta Peg	2.9480	5400.0	77	34139	No
16	GOM_TRA_1PNPDE20080910_013832_000000352072_00017_34139_6952.N1	10-SEP-2008 01:38:32	Bright	35.000	89	5Alp Cep	2.4510	8000.0	70	34139	No
17	GOM_TRA_1PNPDE20080910_014615_000000352072_00017_34139_6953.N1	10-SEP-2008 01:46:15	Bright	34.500	49	1Alp UMi	1.9900	6300.0	69	34139	No
18	GOM_TRA_1PNPDE20080910_020333_000000412072_00017_34139_6954.N1	10-SEP-2008 02:03:33	Bright	40.500	24	66Alp Gem	1.5800	10200.	81	34139	No
19	GOM_TRA_1PNPDE20080910_021146_000000592072_00017_34139_7091.N1	10-SEP-2008 02:11:46	Twilight	58.500	8	10Alp CMi	0.40000	6500.0	117	34139	Yes
20	GOM_TRA_1PNPDE20080910_022015_000000542072_00017_34139_7092.N1	10-SEP-2008 02:20:15	Dark	54.000	1	9Alp CMa	-1.4400	11000.	108	34139	No
21	GOM_TRA_1PNPDE20080910_022758_000000432072_00017_34139_7093.N1	10-SEP-2008 02:27:58	Dark	43.000	161	Tau Pup	2.9310	4500.0	86	34139	No
22	GOM_TRA_1PNPDE20080910_022914_000000532072_00017_34139_7094.N1	10-SEP-2008 02:29:14	Dark	53.000	2	Alp Car	-0.73600	7000.0	106	34139	No
23	GOM_TRA_1PNPDE20080910_023937_000000382072_00018_34140_7095.N1	10-SEP-2008 02:39:37	Dark	38.000	143	Alp Hyi	2.8570	7200.0	76	34140	No
24	GOM_TRA_1PNPDE20080910_024100_000000442072_00018_34140_7096.N1	10-SEP-2008 02:41:00	Dark	44.000	9	Alp Eri	0.45300	24000.	88	34140	No
25	GOM_TRA_1PNPDE20080910_024746_000000442072_00018_34140_7097.N1	10-SEP-2008 02:47:46	Straylight	44.000	63	Bet Gru	2.1500	2800.0	88	34140	No
26	GOM_TRA_1PNPDE20080910_025221_000000452072_00018_34140_7098.N1	10-SEP-2008 02:52:21	Straylight	45.000	18	24Alp PsA	1.1660	9700.0	90	34140	No
27	GOM_TRA_1PNPDE20080910_030116_000000372072_00018_34140_7099.N1	10-SEP-2008 03:01:16	Bright	37.000	162	34Alp Aqr	2.9440	5350.0	74	34140	No
28	GOM_TRA_1PNPDE20080910_030415_000000382072_00018_34140_7100.N1	10-SEP-2008 03:04:15	Bright	38.000	61	8Eps Peg	2.1000	3900.0	76	34140	No
29	GOM_TRA_1PNPDE20080910_030615_000000432072_00018_34140_7101.N1	10-SEP-2008 03:06:15	Bright	42.500	90	54Alp Peg	2.4870	11000.	85	34140	No
30	GOM_TRA_1PNPDE20080910_031029_000000392072_00018_34140_7102.N1	10-SEP-2008 03:10:29	Bright	38.500	164	44Eta Peg	2.9480	5400.0	77	34140	No
31	GOM_TRA_1PNPDE20080910_031908_000000352072_00018_34140_7103.N1	10-SEP-2008 03:19:08	Bright	35.000	89	5Alp Cep	2.4510	8000.0	70	34140	No
32	GOM_TRA_1PNPDE20080910_032044_000000252072_00018_34140_7104.N1	10-SEP-2008 03:20:44	Twi_and_stray	25.000	74	11Bet Cas	2.2680	6600.0	50	34140	No
33	GOM_TRA_1PNPDE20080910_032651_000000362072_00018_34140_7105.N1	10-SEP-2008 03:26:51	Bright	35.500	49	1Alp UMi	1.9900	6300.0	71	34140	No
34	GOM_TRA_1PNPDE20080910_034409_000000412072_00018_34140_7225.N1	10-SEP-2008 03:44:09	Bright	41.000	24	66Alp Gem	1.5800	10200.	82	34140	No
35	GOM_TRA_1PNPDE20080910_035223_000000552072_00018_34140_7226.N1	10-SEP-2008 03:52:23	Twilight	54.500	8	10Alp CMi	0.40000	6500.0	109	34140	No
36	GOM_TRA_1PNPDE20080910_040052_000000592072_00018_34140_7227.N1	10-SEP-2008 04:00:52	Dark	58.500	1	9Alp CMa	-1.4400	11000.	117	34140	No
37	GOM_TRA_1PNPDE20080910_040320_000000472072_00018_34140_7228.N1	10-SEP-2008 04:03:20	Dark	47.000	23	21Eps CMa	1.5020	26000.	94	34140	No
38	GOM_TRA_1PNPDE20080910_040529_000000452072_00018_34140_7229.N1	10-SEP-2008 04:05:29	Dark	45.000	177	1Zet CMa	3.0220	26000.	90	34140	No
39	GOM_TRA_1PNPDE20080910_040835_000000402072_00018_34140_7230.N1	10-SEP-2008 04:08:35	Dark	40.000	161	Tau Pup	2.9310	4500.0	80	34140	No
40	GOM_TRA_1PNPDE20080910_040950_000000562072_00018_34140_7231.N1	10-SEP-2008 04:09:50	Dark	56.000	2	Alp Car	-0.73600	7000.0	112	34140	No
41	GOM_TRA_1PNPDE20080910_042013_000000392072_00019_34141_7232.N1	10-SEP-2008 04:20:13	Dark	38.500	143	Alp Hyi	2.8570	7200.0	77	34141	No
42	GOM_TRA_1PNPDE20080910_042136_000000442072_00019_34141_7233.N1	10-SEP-2008 04:21:36	Dark	44.000	9	Alp Eri	0.45300	24000.	88	34141	No
43	GOM_TRA_1PNPDE20080910_042822_000000482072_00019_34141_7234.N1	10-SEP-2008 04:28:22	Straylight	47.500	63	Bet Gru	2.1500	2800.0	95	34141	No
44	GOM_TRA_1PNPDE20080910_043257_000000462072_00019_34141_7235.N1	10-SEP-2008 04:32:57	Straylight	45.500	18	24Alp PsA	1.1660	9700.0	91	34141	No
45	GOM_TRA_1PNPDE20080910_044153_000000372072_00019_34141_7236.N1	10-SEP-2008 04:41:53	Bright	37.000	162	34Alp Aqr	2.9440	5350.0	74	34141	No
46	GOM_TRA_1PNPDE20080910_044451_000000382072_00019_34141_7237.N1	10-SEP-2008 04:44:51	Bright	37.500	61	8Eps Peg	2.1000	3900.0	75	34141	No
47	GOM_TRA_1PNPDE20080910_044651_000000412072_00019_34141_7238.N1	10-SEP-2008 04:46:51	Bright	41.000	90	54Alp Peg	2.4870	11000.	82	34141	No
48	GOM_TRA_1PNPDE20080910_045105_000000382072_00019_34141_7239.N1	10-SEP-2008 04:51:05	Bright	37.500	164	44Eta Peg	2.9480	5400.0	75	34141	No
49	GOM_TRA_1PNPDE20080910_045944_000000362072_00019_34141_7240.N1	10-SEP-2008 04:59:44	Bright	35.500	89	5Alp Cep	2.4510	8000.0	71	34141	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:	12.640	20.437	8.7328
St. deviation:	5.9406	1.9387	3.3436
Maximum:	21.359	23.949	11.097
Minimum:	2.2573	16.669	6.3685
Number of data:	18.000	21.000	2.0000

6.2 Plot for DARK limb products

6.3 Plot for BRIGHT limb products

6.3 Plot for TWILIGHT 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:	0.18027	-1.2789	0.14993	-1.3206
St. deviation:	0.45342	0.68830	0.71852	0.86921
Maximum:	5.6000	4.4000	4.0000	3.2000
Minimum:	-4.2000	-8.7000	-3.7000	-5.9000
Number of data:	17100.	17100.	18000.	18000.

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	10-SEP-2008 00:05:39
CALIBRATION_DATABASE	GOM_CAL_AXVIEC20080904_073713_20080902_000000_20100101_000000	1	10-SEP-2008 00:05:39
LEVEL-1B_PROC_CONFIG	GOM_PR1_AXNIEC20050627_151042_20020301_000000_20100101_000000	1	10-SEP-2008 00:05:39
STAR_CATALOGUE	GOM_CAT_AXVIEC20020121_161009_20020101_000000_20200101_000000	1	10-SEP-2008 00:05:39
STELLAR_SPECTRA_DATABANK	GOM_STS_AXNIEC20040308_103538_20020101_160000_20100101_000000	1	10-SEP-2008 00:05:39
ECMWF_FILE	AUX_ECF_AXNECM20080909_072111_20080909_210000_20080910_090000	1	10-SEP-2008 00:05:39
ECMWF_FILE	AUX_ECF_AXNECM20080909_192110_20080910_030000_20080910_150000	34	10-SEP-2008 03:44:09
OPTIONAL_ECMWF_FILE	MISSING	1	10-SEP-2008 00:05:39
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20080909_211303_000057382072_00014_34136_6327.N1	1	10-SEP-2008 00:05:39
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20080909_225400_000057382072_00015_34137_6328.N1	4	10-SEP-2008 00:39:38
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20080910_003457_000054192072_00016_34138_6329.N1	19	10-SEP-2008 02:11:46
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20080910_021035_000041442072_00017_34139_6330.N1	34	10-SEP-2008 03:44:09

Reports

Daily Report Level 2 Dataset IPF v6.01

Daily Reports of NRT data

Data Anomaly Reports

Instrument Anomaly Reports

Monthly Reports

e-mail webmaster

Last modified:
24-Apr-2008