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	10AUG2008 05:32:36
Data source version	GOMOS/5.00
Start time of products	08AUG2008 00:02:01
Stop time of products	08AUG2008 04:36:14
Store outputs in DB	Yes
Nb of level 1b prods	49
Nb of prods with errors	0

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
08-AUG-2008 01:17:09	1ZetCMa	177	33666
08-AUG-2008 02:57:45	1ZetCMa	177	33667

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_1PNPDE20080808_000201_000000422071_00045_33666_0694.N1	08-AUG-2008 00:02:01	Straylight	42.000	31	Alp Gru	1.7340	15200.	84	33666	No
2	GOM_TRA_1PNPDE20080808_000505_000000442071_00045_33666_0695.N1	08-AUG-2008 00:05:05	Straylight	43.500	172	Gam Gru	3.0030	13100.	87	33666	No
3	GOM_TRA_1PNPDE20080808_002009_000000382071_00045_33666_0696.N1	08-AUG-2008 00:20:09	Bright	38.000	11	53Alp Aql	0.76500	8000.0	76	33666	No
4	GOM_TRA_1PNPDE20080808_002147_000000352071_00045_33666_0697.N1	08-AUG-2008 00:21:47	Bright	35.000	168	17Zet Aql	2.9860	11000.	70	33666	No
5	GOM_TRA_1PNPDE20080808_002855_000000342071_00045_33666_0698.N1	08-AUG-2008 00:28:55	Bright	34.000	5	3Alp Lyr	0.033000	11000.	68	33666	No
6	GOM_TRA_1PNPDE20080808_003031_000000362071_00045_33666_0699.N1	08-AUG-2008 00:30:31	Bright	35.500	144	18Del Cyg	2.8600	11000.	71	33666	No
7	GOM_TRA_1PNPDE20080808_004312_000000342071_00045_33666_0700.N1	08-AUG-2008 00:43:12	Bright	34.000	49	1Alp UMi	1.9900	6300.0	68	33666	No
8	GOM_TRA_1PNPDE20080808_005611_000000402071_00045_33666_0701.N1	08-AUG-2008 00:56:11	Bright	40.000	42	34Bet Aur	1.9000	10200.	80	33666	No
9	GOM_TRA_1PNPDE20080808_005830_000000372071_00045_33666_0702.N1	08-AUG-2008 00:58:30	Bright	36.500	107	37The Aur	2.6490	11000.	73	33666	No
10	GOM_TRA_1PNPDE20080808_010336_000000432071_00045_33666_0703.N1	08-AUG-2008 01:03:36	Twi_and_stray	43.000	176	23Zet Tau	3.0200	22000.	86	33666	No
11	GOM_TRA_1PNPDE20080808_010722_000000462071_00045_33666_0704.N1	08-AUG-2008 01:07:22	Dark	45.500	14	58Alp Ori	0.87000	3000.0	91	33666	No
12	GOM_TRA_1PNPDE20080808_011017_000000412071_00045_33666_0705.N1	08-AUG-2008 01:10:17	Dark	41.000	30	46Eps Ori	1.6940	30000.	82	33666	No
13	GOM_TRA_1PNPDE20080808_011139_000000402071_00045_33666_0706.N1	08-AUG-2008 01:11:39	Dark	40.000	125	44Iot Ori	2.7700	30000.	80	33666	No
14	GOM_TRA_1PNPDE20080808_011312_000000382071_00045_33666_0841.N1	08-AUG-2008 01:13:12	Dark	37.500	1	9Alp CMa	-1.4400	11000.	75	33666	No
15	GOM_TRA_1PNPDE20080808_011501_000000432071_00045_33666_0842.N1	08-AUG-2008 01:15:01	Dark	43.000	101	11Alp Lep	2.5820	7000.0	86	33666	No
16	GOM_TRA_1PNPDE20080808_013247_000000432071_00046_33667_0843.N1	08-AUG-2008 01:32:47	Dark	43.000	9	Alp Eri	0.45300	24000.	86	33667	No
17	GOM_TRA_1PNPDE20080808_013909_000000412071_00046_33667_0844.N1	08-AUG-2008 01:39:09	Straylight	40.500	148	Alp Tuc	2.8780	4100.0	81	33667	No
18	GOM_TRA_1PNPDE20080808_014238_000000452071_00046_33667_0845.N1	08-AUG-2008 01:42:38	Straylight	45.000	31	Alp Gru	1.7340	15200.	90	33667	No
19	GOM_TRA_1PNPDE20080808_014541_000000432071_00046_33667_0846.N1	08-AUG-2008 01:45:41	Straylight	42.500	172	Gam Gru	3.0030	13100.	85	33667	No
20	GOM_TRA_1PNPDE20080808_020045_000000362071_00046_33667_0847.N1	08-AUG-2008 02:00:45	Bright	36.000	11	53Alp Aql	0.76500	8000.0	72	33667	No
21	GOM_TRA_1PNPDE20080808_020223_000000372071_00046_33667_0848.N1	08-AUG-2008 02:02:23	Bright	36.500	168	17Zet Aql	2.9860	11000.	73	33667	No
22	GOM_TRA_1PNPDE20080808_020931_000000392071_00046_33667_0849.N1	08-AUG-2008 02:09:31	Bright	39.000	5	3Alp Lyr	0.033000	11000.	78	33667	No
23	GOM_TRA_1PNPDE20080808_021107_000000352071_00046_33667_0850.N1	08-AUG-2008 02:11:07	Bright	35.000	144	18Del Cyg	2.8600	11000.	70	33667	No
24	GOM_TRA_1PNPDE20080808_022348_000000332071_00046_33667_0851.N1	08-AUG-2008 02:23:48	Bright	32.500	49	1Alp UMi	1.9900	6300.0	65	33667	No
25	GOM_TRA_1PNPDE20080808_023647_000000492071_00046_33667_1025.N1	08-AUG-2008 02:36:47	Bright	48.500	42	34Bet Aur	1.9000	10200.	97	33667	No
26	GOM_TRA_1PNPDE20080808_023906_000000422071_00046_33667_1026.N1	08-AUG-2008 02:39:06	Bright	41.500	107	37The Aur	2.6490	11000.	83	33667	No
27	GOM_TRA_1PNPDE20080808_024412_000000422071_00046_33667_1027.N1	08-AUG-2008 02:44:12	Twi_and_stray	42.000	176	23Zet Tau	3.0200	22000.	84	33667	No
28	GOM_TRA_1PNPDE20080808_024758_000000552071_00046_33667_1028.N1	08-AUG-2008 02:47:58	Dark	55.000	14	58Alp Ori	0.87000	3000.0	110	33667	No
29	GOM_TRA_1PNPDE20080808_025054_000000412071_00046_33667_1029.N1	08-AUG-2008 02:50:54	Dark	40.500	30	46Eps Ori	1.6940	30000.	81	33667	No
30	GOM_TRA_1PNPDE20080808_025216_000000402071_00046_33667_1030.N1	08-AUG-2008 02:52:16	Dark	40.000	125	44Iot Ori	2.7700	30000.	80	33667	No
31	GOM_TRA_1PNPDE20080808_025348_000000372071_00046_33667_1031.N1	08-AUG-2008 02:53:48	Dark	37.000	1	9Alp CMa	-1.4400	11000.	74	33667	No
32	GOM_TRA_1PNPDE20080808_025538_000000422071_00046_33667_1032.N1	08-AUG-2008 02:55:38	Dark	41.500	101	11Alp Lep	2.5820	7000.0	83	33667	No
33	GOM_TRA_1PNPDE20080808_031324_000000422071_00047_33668_1033.N1	08-AUG-2008 03:13:24	Dark	42.000	9	Alp Eri	0.45300	24000.	84	33668	No
34	GOM_TRA_1PNPDE20080808_031946_000000432071_00047_33668_1034.N1	08-AUG-2008 03:19:46	Straylight	42.500	148	Alp Tuc	2.8780	4100.0	85	33668	No
35	GOM_TRA_1PNPDE20080808_032314_000000422071_00047_33668_1035.N1	08-AUG-2008 03:23:14	Straylight	41.500	31	Alp Gru	1.7340	15200.	83	33668	No
36	GOM_TRA_1PNPDE20080808_032617_000000452071_00047_33668_1036.N1	08-AUG-2008 03:26:17	Straylight	44.500	172	Gam Gru	3.0030	13100.	89	33668	No
37	GOM_TRA_1PNPDE20080808_034121_000000362071_00047_33668_1037.N1	08-AUG-2008 03:41:21	Bright	35.500	11	53Alp Aql	0.76500	8000.0	71	33668	No
38	GOM_TRA_1PNPDE20080808_034259_000000362071_00047_33668_1038.N1	08-AUG-2008 03:42:59	Bright	35.500	168	17Zet Aql	2.9860	11000.	71	33668	No
39	GOM_TRA_1PNPDE20080808_035007_000000392071_00047_33668_1039.N1	08-AUG-2008 03:50:07	Bright	38.500	5	3Alp Lyr	0.033000	11000.	77	33668	No
40	GOM_TRA_1PNPDE20080808_035143_000000372071_00047_33668_1040.N1	08-AUG-2008 03:51:43	Bright	36.500	144	18Del Cyg	2.8600	11000.	73	33668	No
41	GOM_TRA_1PNPDE20080808_040424_000000362071_00047_33668_1041.N1	08-AUG-2008 04:04:24	Bright	35.500	49	1Alp UMi	1.9900	6300.0	71	33668	No
42	GOM_TRA_1PNPDE20080808_041723_000000362071_00047_33668_1179.N1	08-AUG-2008 04:17:23	Bright	35.500	42	34Bet Aur	1.9000	10200.	71	33668	No
43	GOM_TRA_1PNPDE20080808_041942_000000362071_00047_33668_1180.N1	08-AUG-2008 04:19:42	Bright	35.500	107	37The Aur	2.6490	11000.	71	33668	No
44	GOM_TRA_1PNPDE20080808_042448_000000422071_00047_33668_1181.N1	08-AUG-2008 04:24:48	Twi_and_stray	41.500	176	23Zet Tau	3.0200	22000.	83	33668	No
45	GOM_TRA_1PNPDE20080808_042834_000000532071_00047_33668_1182.N1	08-AUG-2008 04:28:34	Dark	53.000	14	58Alp Ori	0.87000	3000.0	106	33668	No
46	GOM_TRA_1PNPDE20080808_043130_000000412071_00047_33668_1183.N1	08-AUG-2008 04:31:30	Dark	41.000	30	46Eps Ori	1.6940	30000.	82	33668	No
47	GOM_TRA_1PNPDE20080808_043252_000000402071_00047_33668_1184.N1	08-AUG-2008 04:32:52	Dark	39.500	125	44Iot Ori	2.7700	30000.	79	33668	No
48	GOM_TRA_1PNPDE20080808_043424_000000492071_00047_33668_1185.N1	08-AUG-2008 04:34:24	Dark	49.000	1	9Alp CMa	-1.4400	11000.	98	33668	No
49	GOM_TRA_1PNPDE20080808_043614_000000442071_00047_33668_1186.N1	08-AUG-2008 04:36:14	Dark	44.000	101	11Alp Lep	2.5820	7000.0	88	33668	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:	24.4898 %
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:	14.677	20.393	NaN
St. deviation:	4.9560	4.4951	NaN
Maximum:	19.385	28.548	NaN
Minimum:	4.6417	8.2736	NaN
Number of data:	17.000	21.000	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:	0.067713	-1.2393	0.043523	-1.3775
St. deviation:	0.50469	0.63534	0.81208	0.92046
Maximum:	4.3000	2.8000	5.6000	3.9000
Minimum:	-4.0000	-5.9000	-5.8000	-7.1000
Number of data:	15350.	15350.	17200.	17200.

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	08-AUG-2008 00:02:01
CALIBRATION_DATABASE	GOM_CAL_AXVIEC20080801_080250_20080730_000000_20100101_000000	1	08-AUG-2008 00:02:01
LEVEL-1B_PROC_CONFIG	GOM_PR1_AXNIEC20050627_151042_20020301_000000_20100101_000000	1	08-AUG-2008 00:02:01
STAR_CATALOGUE	GOM_CAT_AXVIEC20020121_161009_20020101_000000_20200101_000000	1	08-AUG-2008 00:02:01
STELLAR_SPECTRA_DATABANK	GOM_STS_AXNIEC20040308_103538_20020101_160000_20100101_000000	1	08-AUG-2008 00:02:01
ECMWF_FILE	AUX_ECF_AXNECM20080807_072111_20080807_210000_20080808_090000	1	08-AUG-2008 00:02:01
ECMWF_FILE	AUX_ECF_AXNECM20080807_190111_20080808_030000_20080808_150000	42	08-AUG-2008 04:17:23
OPTIONAL_ECMWF_FILE	MISSING	1	08-AUG-2008 00:02:01
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20080807_214904_000057382071_00043_33664_6108.N1	1	08-AUG-2008 00:02:01
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20080807_233001_000057382071_00044_33665_6109.N1	14	08-AUG-2008 01:13:12
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20080808_011058_000044632071_00045_33666_6110.N1	25	08-AUG-2008 02:36:47
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20080808_023039_000054192071_00046_33667_6111.N1	42	08-AUG-2008 04:17:23

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