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	02DEC2008 09:28:04
Data source version	GOMOS/5.00
Start time of products	29NOV2008 00:01:16
Stop time of products	29NOV2008 03:27:43
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)

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_1PNPDE20081129_000116_000000432074_00159_35283_5113.N1	29-NOV-2008 00:01:16	Bright	42.500	87	64Gam UMa	2.4330	11000.	85	35283	No
2	GOM_TRA_1PNPDE20081129_000358_000000542074_00159_35283_5114.N1	29-NOV-2008 00:03:58	Bright	53.500	174	52Psi UMa	3.0040	4400.0	107	35283	No
3	GOM_TRA_1PNPDE20081129_000631_000000402074_00159_35283_5115.N1	29-NOV-2008 00:06:31	Bright	40.000	152	12Alp2CVn	2.8900	11000.	80	35283	No
4	GOM_TRA_1PNPDE20081129_001550_000000532074_00159_35283_5116.N1	29-NOV-2008 00:15:50	Bright	53.000	62	94Bet Leo	2.1360	9700.0	106	35283	No
5	GOM_TRA_1PNPDE20081129_001911_000000422074_00159_35283_5117.N1	29-NOV-2008 00:19:11	Bright	42.000	121	29Gam Vir	2.7400	7200.0	84	35283	No
6	GOM_TRA_1PNPDE20081129_002445_000000442074_00159_35283_5234.N1	29-NOV-2008 00:24:45	Twilight	43.500	100	4Gam Crv	2.5800	13100.	87	35283	No
7	GOM_TRA_1PNPDE20081129_002620_000000462074_00159_35283_5235.N1	29-NOV-2008 00:26:20	Dark	45.500	171	2Eps Crv	3.0010	4250.0	91	35283	No
8	GOM_TRA_1PNPDE20081129_004424_000000472074_00160_35284_5236.N1	29-NOV-2008 00:44:24	Dark	47.000	34	Gam2Vel	1.7930	23000.	94	35284	No
9	GOM_TRA_1PNPDE20081129_004605_000000552074_00160_35284_5237.N1	29-NOV-2008 00:46:05	Dark	54.500	70	Zet Pup	2.2460	39000.	109	35284	No
10	GOM_TRA_1PNPDE20081129_004938_000000612074_00160_35284_5238.N1	29-NOV-2008 00:49:38	Dark	60.500	117	Pi Pup	2.7060	3800.0	121	35284	No
11	GOM_TRA_1PNPDE20081129_005330_000000692074_00160_35284_5239.N1	29-NOV-2008 00:53:30	Dark	69.000	23	21Eps CMa	1.5020	26000.	138	35284	No
12	GOM_TRA_1PNPDE20081129_010013_000000572074_00160_35284_5240.N1	29-NOV-2008 01:00:13	Straylight	56.500	101	11Alp Lep	2.5820	7000.0	113	35284	No
13	GOM_TRA_1PNPDE20081129_010355_000000602074_00160_35284_5241.N1	29-NOV-2008 01:03:55	Straylight	60.000	7	19Bet Ori	0.10000	14000.	120	35284	No
14	GOM_TRA_1PNPDE20081129_010704_000000622074_00160_35284_5242.N1	29-NOV-2008 01:07:04	Twi_and_stray	62.000	30	46Eps Ori	1.6940	30000.	124	35284	No
15	GOM_TRA_1PNPDE20081129_010951_000000632074_00160_35284_5243.N1	29-NOV-2008 01:09:51	Twi_and_stray	63.000	27	24Gam Ori	1.6360	26000.	126	35284	No
16	GOM_TRA_1PNPDE20081129_011202_000000592074_00160_35284_5244.N1	29-NOV-2008 01:12:02	Bright	59.000	13	87Alp Tau	0.86700	3800.0	118	35284	No
17	GOM_TRA_1PNPDE20081129_011333_000000402074_00160_35284_5245.N1	29-NOV-2008 01:13:33	Bright	40.000	146	25Eta Tau	2.8730	15200.	80	35284	No
18	GOM_TRA_1PNPDE20081129_011557_000000392074_00160_35284_5246.N1	29-NOV-2008 01:15:57	Bright	39.000	150	44Zet Per	2.8900	28000.	78	35284	No
19	GOM_TRA_1PNPDE20081129_011824_000000382074_00160_35284_5247.N1	29-NOV-2008 01:18:24	Bright	37.500	149	45Eps Per	2.8880	30000.	75	35284	No
20	GOM_TRA_1PNPDE20081129_012225_000000492074_00160_35284_5248.N1	29-NOV-2008 01:22:25	Bright	49.000	6	13Alp Aur	0.080000	3400.0	98	35284	No
21	GOM_TRA_1PNPDE20081129_012423_000000532074_00160_35284_5249.N1	29-NOV-2008 01:24:23	Bright	52.500	42	34Bet Aur	1.9000	10200.	105	35284	No
22	GOM_TRA_1PNPDE20081129_013830_000000442074_00160_35284_5250.N1	29-NOV-2008 01:38:30	Bright	44.000	36	50Alp UMa	1.8000	6300.0	88	35284	No
23	GOM_TRA_1PNPDE20081129_014007_000000462074_00160_35284_5251.N1	29-NOV-2008 01:40:07	Bright	45.500	82	48Bet UMa	2.3650	10600.	91	35284	No
24	GOM_TRA_1PNPDE20081129_014151_000000432074_00160_35284_5252.N1	29-NOV-2008 01:41:51	Bright	43.000	87	64Gam UMa	2.4330	11000.	86	35284	No
25	GOM_TRA_1PNPDE20081129_014434_000000502074_00160_35284_5253.N1	29-NOV-2008 01:44:34	Bright	49.500	174	52Psi UMa	3.0040	4400.0	99	35284	No
26	GOM_TRA_1PNPDE20081129_014707_000000382074_00160_35284_5254.N1	29-NOV-2008 01:47:07	Bright	38.000	152	12Alp2CVn	2.8900	11000.	76	35284	No
27	GOM_TRA_1PNPDE20081129_015627_000000532074_00160_35284_5255.N1	29-NOV-2008 01:56:27	Bright	53.000	62	94Bet Leo	2.1360	9700.0	106	35284	No
28	GOM_TRA_1PNPDE20081129_015947_000000432074_00160_35284_5364.N1	29-NOV-2008 01:59:47	Bright	42.500	121	29Gam Vir	2.7400	7200.0	85	35284	No
29	GOM_TRA_1PNPDE20081129_020522_000000442074_00160_35284_5365.N1	29-NOV-2008 02:05:22	Twilight	43.500	100	4Gam Crv	2.5800	13100.	87	35284	No
30	GOM_TRA_1PNPDE20081129_020657_000000472074_00160_35284_5366.N1	29-NOV-2008 02:06:57	Dark	47.000	171	2Eps Crv	3.0010	4250.0	94	35284	No
31	GOM_TRA_1PNPDE20081129_022501_000000472074_00161_35285_5367.N1	29-NOV-2008 02:25:01	Dark	47.000	34	Gam2Vel	1.7930	23000.	94	35285	No
32	GOM_TRA_1PNPDE20081129_022642_000000542074_00161_35285_5368.N1	29-NOV-2008 02:26:42	Dark	54.000	70	Zet Pup	2.2460	39000.	108	35285	No
33	GOM_TRA_1PNPDE20081129_023015_000000622074_00161_35285_5369.N1	29-NOV-2008 02:30:15	Dark	62.000	117	Pi Pup	2.7060	3800.0	124	35285	No
34	GOM_TRA_1PNPDE20081129_023406_000000682074_00161_35285_5370.N1	29-NOV-2008 02:34:06	Dark	68.000	23	21Eps CMa	1.5020	26000.	136	35285	No
35	GOM_TRA_1PNPDE20081129_024049_000000552074_00161_35285_5371.N1	29-NOV-2008 02:40:49	Straylight	54.500	101	11Alp Lep	2.5820	7000.0	109	35285	No
36	GOM_TRA_1PNPDE20081129_024431_000000602074_00161_35285_5372.N1	29-NOV-2008 02:44:31	Straylight	60.000	7	19Bet Ori	0.10000	14000.	120	35285	No
37	GOM_TRA_1PNPDE20081129_024740_000000622074_00161_35285_5373.N1	29-NOV-2008 02:47:40	Twi_and_stray	62.000	30	46Eps Ori	1.6940	30000.	124	35285	No
38	GOM_TRA_1PNPDE20081129_025027_000000672074_00161_35285_5374.N1	29-NOV-2008 02:50:27	Twi_and_stray	66.500	27	24Gam Ori	1.6360	26000.	133	35285	No
39	GOM_TRA_1PNPDE20081129_025238_000000542074_00161_35285_5375.N1	29-NOV-2008 02:52:38	Bright	53.500	13	87Alp Tau	0.86700	3800.0	107	35285	No
40	GOM_TRA_1PNPDE20081129_025409_000000412074_00161_35285_5376.N1	29-NOV-2008 02:54:09	Bright	40.500	146	25Eta Tau	2.8730	15200.	81	35285	No
41	GOM_TRA_1PNPDE20081129_025633_000000392074_00161_35285_5377.N1	29-NOV-2008 02:56:33	Bright	38.500	150	44Zet Per	2.8900	28000.	77	35285	No
42	GOM_TRA_1PNPDE20081129_025900_000000382074_00161_35285_5378.N1	29-NOV-2008 02:59:00	Bright	37.500	149	45Eps Per	2.8880	30000.	75	35285	No
43	GOM_TRA_1PNPDE20081129_030301_000000592074_00161_35285_5379.N1	29-NOV-2008 03:03:01	Bright	58.500	6	13Alp Aur	0.080000	3400.0	117	35285	No
44	GOM_TRA_1PNPDE20081129_030458_000000512074_00161_35285_5380.N1	29-NOV-2008 03:04:58	Bright	50.500	42	34Bet Aur	1.9000	10200.	101	35285	No
45	GOM_TRA_1PNPDE20081129_031906_000000452074_00161_35285_5518.N1	29-NOV-2008 03:19:06	Bright	45.000	36	50Alp UMa	1.8000	6300.0	90	35285	No
46	GOM_TRA_1PNPDE20081129_032043_000000462074_00161_35285_5519.N1	29-NOV-2008 03:20:43	Bright	46.000	82	48Bet UMa	2.3650	10600.	92	35285	No
47	GOM_TRA_1PNPDE20081129_032227_000000432074_00161_35285_5520.N1	29-NOV-2008 03:22:27	Bright	42.500	87	64Gam UMa	2.4330	11000.	85	35285	No
48	GOM_TRA_1PNPDE20081129_032510_000000532074_00161_35285_5521.N1	29-NOV-2008 03:25:10	Bright	52.500	174	52Psi UMa	3.0040	4400.0	105	35285	No
49	GOM_TRA_1PNPDE20081129_032743_000000392074_00161_35285_5522.N1	29-NOV-2008 03:27:43	Bright	39.000	152	12Alp2CVn	2.8900	11000.	78	35285	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:	30.6122 %
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:	16.305	19.165	18.836
St. deviation:	2.9980	4.1415	0.096378
Maximum:	19.908	24.156	18.904
Minimum:	12.819	7.0709	18.768
Number of data:	10.000	29.000	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:	0.29557	-1.0002	0.27272	-1.1899
St. deviation:	0.57276	1.1380	0.97677	1.5601
Maximum:	3.3000	3.7000	6.4000	7.3000
Minimum:	-2.5000	-13.000	-5.6000	-8.7000
Number of data:	12350.	12350.	30100.	30100.

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	29-NOV-2008 00:01:16
CALIBRATION_DATABASE	GOM_CAL_AXVIEC20081125_092015_20081123_000000_20100101_000000	1	29-NOV-2008 00:01:16
LEVEL-1B_PROC_CONFIG	GOM_PR1_AXNIEC20050627_151042_20020301_000000_20100101_000000	1	29-NOV-2008 00:01:16
STAR_CATALOGUE	GOM_CAT_AXVIEC20020121_161009_20020101_000000_20200101_000000	1	29-NOV-2008 00:01:16
STELLAR_SPECTRA_DATABANK	GOM_STS_AXNIEC20040308_103538_20020101_160000_20100101_000000	1	29-NOV-2008 00:01:16
ECMWF_FILE	AUX_ECF_AXNECM20081128_072111_20081128_210000_20081129_090000	1	29-NOV-2008 00:01:16
ECMWF_FILE	AUX_ECF_AXNECM20081128_190113_20081129_030000_20081129_150000	45	29-NOV-2008 03:19:06
OPTIONAL_ECMWF_FILE	MISSING	1	29-NOV-2008 00:01:16
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20081128_205229_000060572074_00157_35281_6861.N1	1	29-NOV-2008 00:01:16
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20081128_223845_000057382074_00158_35282_6862.N1	6	29-NOV-2008 00:24:45
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20081129_001942_000054192074_00159_35283_6863.N1	28	29-NOV-2008 01:59:47
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20081129_015520_000041442074_00160_35284_6864.N1	45	29-NOV-2008 03:19:06

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