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	18OCT2008 05:44:01
Data source version	GOMOS/5.00
Start time of products	16OCT2008 00:04:50
Stop time of products	16OCT2008 04:05:08
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)

No missing products.

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_1PNPDE20081016_000450_000000582073_00030_34653_4901.N1	16-OCT-2008 00:04:50	Dark	57.500	48	30Alp Hya	1.9770	4100.0	115	34653	Yes
2	GOM_TRA_1PNPDE20081016_001422_000000462073_00030_34653_4902.N1	16-OCT-2008 00:14:22	Dark	45.500	65	Lam Vel	2.2040	4400.0	91	34653	No
3	GOM_TRA_1PNPDE20081016_001733_000000442073_00031_34654_4903.N1	16-OCT-2008 00:17:33	Dark	44.000	34	Gam2Vel	1.7930	23000.	88	34654	No
4	GOM_TRA_1PNPDE20081016_002151_000000452073_00031_34654_4904.N1	16-OCT-2008 00:21:51	Dark	44.500	161	Tau Pup	2.9310	4500.0	89	34654	No
5	GOM_TRA_1PNPDE20081016_002311_000000522073_00031_34654_4905.N1	16-OCT-2008 00:23:11	Dark	52.000	2	Alp Car	-0.73600	7000.0	104	34654	No
6	GOM_TRA_1PNPDE20081016_003053_000000392073_00031_34654_4906.N1	16-OCT-2008 00:30:53	Dark	38.500	143	Alp Hyi	2.8570	7200.0	77	34654	No
7	GOM_TRA_1PNPDE20081016_003220_000000412073_00031_34654_4907.N1	16-OCT-2008 00:32:20	Dark	40.500	9	Alp Eri	0.45300	24000.	81	34654	No
8	GOM_TRA_1PNPDE20081016_003456_000000452073_00031_34654_4908.N1	16-OCT-2008 00:34:56	Straylight	45.000	157	The1Eri	2.9060	9300.0	90	34654	No
9	GOM_TRA_1PNPDE20081016_004356_000000442073_00031_34654_4909.N1	16-OCT-2008 00:43:56	Straylight	44.000	52	16Bet Cet	2.0370	4500.0	88	34654	No
10	GOM_TRA_1PNPDE20081016_005334_000000372073_00031_34654_4910.N1	16-OCT-2008 00:53:34	Bright	36.500	140	88Gam Peg	2.8340	26000.	73	34654	No
11	GOM_TRA_1PNPDE20081016_005731_000000372073_00031_34654_4911.N1	16-OCT-2008 00:57:31	Bright	36.500	58	21Alp And	2.0730	11000.	73	34654	No
12	GOM_TRA_1PNPDE20081016_010000_000000432073_00031_34654_4912.N1	16-OCT-2008 01:00:00	Bright	42.500	53	43Bet And	2.0480	3300.0	85	34654	No
13	GOM_TRA_1PNPDE20081016_010532_000000382073_00031_34654_4913.N1	16-OCT-2008 01:05:32	Bright	37.500	68	18Alp Cas	2.2250	4500.0	75	34654	No
14	GOM_TRA_1PNPDE20081016_010654_000000352073_00031_34654_4914.N1	16-OCT-2008 01:06:54	Bright	34.500	76	27Gam Cas	2.3000	30000.	69	34654	No
15	GOM_TRA_1PNPDE20081016_011433_000000362073_00031_34654_4915.N1	16-OCT-2008 01:14:33	Bright	35.500	49	1Alp UMi	1.9900	6300.0	71	34654	No
16	GOM_TRA_1PNPDE20081016_012247_000000382073_00031_34654_4916.N1	16-OCT-2008 01:22:47	Bright	37.500	36	50Alp UMa	1.8000	6300.0	75	34654	No
17	GOM_TRA_1PNPDE20081016_012421_000000352073_00031_34654_4917.N1	16-OCT-2008 01:24:21	Bright	34.500	82	48Bet UMa	2.3650	10600.	69	34654	No
18	GOM_TRA_1PNPDE20081016_012745_000000352073_00031_34654_4918.N1	16-OCT-2008 01:27:45	Bright	34.500	174	52Psi UMa	3.0040	4400.0	69	34654	No
19	GOM_TRA_1PNPDE20081016_013444_000000492073_00031_34654_4919.N1	16-OCT-2008 01:34:44	Bright	49.000	166	17Eps Leo	2.9800	6000.0	98	34654	No
20	GOM_TRA_1PNPDE20081016_013800_000000402073_00031_34654_4920.N1	16-OCT-2008 01:38:00	Bright	40.000	22	32Alp Leo	1.3600	15200.	80	34654	No
21	GOM_TRA_1PNPDE20081016_014527_000000572073_00031_34654_5061.N1	16-OCT-2008 01:45:27	Dark	57.000	48	30Alp Hya	1.9770	4100.0	114	34654	No
22	GOM_TRA_1PNPDE20081016_015458_000000462073_00031_34654_5062.N1	16-OCT-2008 01:54:58	Dark	45.500	65	Lam Vel	2.2040	4400.0	91	34654	No
23	GOM_TRA_1PNPDE20081016_015810_000000412073_00032_34655_5063.N1	16-OCT-2008 01:58:10	Dark	40.500	34	Gam2Vel	1.7930	23000.	81	34655	No
24	GOM_TRA_1PNPDE20081016_020227_000000442073_00032_34655_5064.N1	16-OCT-2008 02:02:27	Dark	43.500	161	Tau Pup	2.9310	4500.0	87	34655	No
25	GOM_TRA_1PNPDE20081016_020348_000000502073_00032_34655_5065.N1	16-OCT-2008 02:03:48	Dark	50.000	2	Alp Car	-0.73600	7000.0	100	34655	No
26	GOM_TRA_1PNPDE20081016_021130_000000382073_00032_34655_5066.N1	16-OCT-2008 02:11:30	Dark	37.500	143	Alp Hyi	2.8570	7200.0	75	34655	No
27	GOM_TRA_1PNPDE20081016_021256_000000472073_00032_34655_5067.N1	16-OCT-2008 02:12:56	Dark	46.500	9	Alp Eri	0.45300	24000.	93	34655	No
28	GOM_TRA_1PNPDE20081016_021532_000000462073_00032_34655_5068.N1	16-OCT-2008 02:15:32	Straylight	46.000	157	The1Eri	2.9060	9300.0	92	34655	No
29	GOM_TRA_1PNPDE20081016_022432_000000442073_00032_34655_5069.N1	16-OCT-2008 02:24:32	Straylight	43.500	52	16Bet Cet	2.0370	4500.0	87	34655	No
30	GOM_TRA_1PNPDE20081016_023410_000000372073_00032_34655_5070.N1	16-OCT-2008 02:34:10	Bright	36.500	140	88Gam Peg	2.8340	26000.	73	34655	No
31	GOM_TRA_1PNPDE20081016_023807_000000372073_00032_34655_5071.N1	16-OCT-2008 02:38:07	Bright	36.500	58	21Alp And	2.0730	11000.	73	34655	No
32	GOM_TRA_1PNPDE20081016_024035_000000422073_00032_34655_5072.N1	16-OCT-2008 02:40:35	Bright	41.500	53	43Bet And	2.0480	3300.0	83	34655	No
33	GOM_TRA_1PNPDE20081016_024608_000000382073_00032_34655_5073.N1	16-OCT-2008 02:46:08	Bright	37.500	68	18Alp Cas	2.2250	4500.0	75	34655	No
34	GOM_TRA_1PNPDE20081016_024729_000000382073_00032_34655_5074.N1	16-OCT-2008 02:47:29	Bright	37.500	76	27Gam Cas	2.3000	30000.	75	34655	No
35	GOM_TRA_1PNPDE20081016_025509_000000342073_00032_34655_5075.N1	16-OCT-2008 02:55:09	Bright	33.500	49	1Alp UMi	1.9900	6300.0	67	34655	No
36	GOM_TRA_1PNPDE20081016_030323_000000382073_00032_34655_5194.N1	16-OCT-2008 03:03:23	Bright	38.000	36	50Alp UMa	1.8000	6300.0	76	34655	No
37	GOM_TRA_1PNPDE20081016_030457_000000372073_00032_34655_5195.N1	16-OCT-2008 03:04:57	Bright	37.000	82	48Bet UMa	2.3650	10600.	74	34655	No
38	GOM_TRA_1PNPDE20081016_030821_000000362073_00032_34655_5196.N1	16-OCT-2008 03:08:21	Bright	35.500	174	52Psi UMa	3.0040	4400.0	71	34655	No
39	GOM_TRA_1PNPDE20081016_031520_000000432073_00032_34655_5197.N1	16-OCT-2008 03:15:20	Bright	43.000	166	17Eps Leo	2.9800	6000.0	86	34655	No
40	GOM_TRA_1PNPDE20081016_031837_000000412073_00032_34655_5198.N1	16-OCT-2008 03:18:37	Bright	41.000	22	32Alp Leo	1.3600	15200.	82	34655	No
41	GOM_TRA_1PNPDE20081016_032603_000000632073_00032_34655_5199.N1	16-OCT-2008 03:26:03	Dark	62.500	48	30Alp Hya	1.9770	4100.0	125	34655	No
42	GOM_TRA_1PNPDE20081016_033535_000000542073_00032_34655_5200.N1	16-OCT-2008 03:35:35	Dark	53.500	65	Lam Vel	2.2040	4400.0	107	34655	No
43	GOM_TRA_1PNPDE20081016_033847_000000482073_00033_34656_5201.N1	16-OCT-2008 03:38:47	Dark	48.000	34	Gam2Vel	1.7930	23000.	96	34656	No
44	GOM_TRA_1PNPDE20081016_034304_000000472073_00033_34656_5202.N1	16-OCT-2008 03:43:04	Dark	46.500	161	Tau Pup	2.9310	4500.0	93	34656	No
45	GOM_TRA_1PNPDE20081016_034425_000000542073_00033_34656_5203.N1	16-OCT-2008 03:44:25	Dark	54.000	2	Alp Car	-0.73600	7000.0	108	34656	No
46	GOM_TRA_1PNPDE20081016_035206_000000372073_00033_34656_5204.N1	16-OCT-2008 03:52:06	Dark	36.500	143	Alp Hyi	2.8570	7200.0	73	34656	No
47	GOM_TRA_1PNPDE20081016_035332_000000402073_00033_34656_5205.N1	16-OCT-2008 03:53:32	Dark	40.000	9	Alp Eri	0.45300	24000.	80	34656	No
48	GOM_TRA_1PNPDE20081016_035609_000000452073_00033_34656_5206.N1	16-OCT-2008 03:56:09	Straylight	44.500	157	The1Eri	2.9060	9300.0	89	34656	No
49	GOM_TRA_1PNPDE20081016_040508_000000402073_00033_34656_5207.N1	16-OCT-2008 04:05:08	Straylight	40.000	52	16Bet Cet	2.0370	4500.0	80	34656	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:	45.8333 %
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:	13.803	20.266	NaN
St. deviation:	5.2505	3.2662	NaN
Maximum:	21.409	27.513	NaN
Minimum:	4.1548	12.270	NaN
Number of data:	20.000	22.000	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:	0.11792	-1.3068	0.11239	-1.3885
St. deviation:	0.43315	0.63274	0.68814	0.86836
Maximum:	24.500	5.8000	6.1000	3.4000
Minimum:	-8.4000	-23.800	-5.0000	-6.6000
Number of data:	19400.	19400.	18800.	18800.

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	16-OCT-2008 00:04:50
CALIBRATION_DATABASE	GOM_CAL_AXVIEC20081008_081911_20081006_000000_20100101_000000	1	16-OCT-2008 00:04:50
LEVEL-1B_PROC_CONFIG	GOM_PR1_AXNIEC20050627_151042_20020301_000000_20100101_000000	1	16-OCT-2008 00:04:50
STAR_CATALOGUE	GOM_CAT_AXVIEC20020121_161009_20020101_000000_20200101_000000	1	16-OCT-2008 00:04:50
STELLAR_SPECTRA_DATABANK	GOM_STS_AXNIEC20040308_103538_20020101_160000_20100101_000000	1	16-OCT-2008 00:04:50
ECMWF_FILE	AUX_ECF_AXNECM20081015_072112_20081015_210000_20081016_090000	1	16-OCT-2008 00:04:50
ECMWF_FILE	AUX_ECF_AXNECM20081015_192112_20081016_030000_20081016_150000	36	16-OCT-2008 03:03:23
OPTIONAL_ECMWF_FILE	MISSING	1	16-OCT-2008 00:04:50
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20081015_222256_000057382073_00029_34652_6568.N1	1	16-OCT-2008 00:04:50
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20081016_000353_000054192073_00030_34653_6569.N1	21	16-OCT-2008 01:45:27
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20081016_013931_000041442073_00031_34654_6570.N1	36	16-OCT-2008 03:03:23

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