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	28SEP2008 05:34:29
Data source version	GOMOS/5.00
Start time of products	26SEP2008 00:22:00
Stop time of products	26SEP2008 06:38:58
Store outputs in DB	Yes
Nb of level 1b prods	48
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
26-SEP-2008 00:37:51	15RhoPup	132	34367
26-SEP-2008 00:41:12	31EtaCMa	88	34367
26-SEP-2008 02:18:28	15RhoPup	132	34368
26-SEP-2008 02:21:49	31EtaCMa	88	34368

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_1PNPDE20080926_002200_000000532072_00245_34367_7513.N1	26-SEP-2008 00:22:00	Bright	52.500	17	78Bet Gem	1.1610	4500.0	105	34367	No
2	GOM_TRA_1PNPDE20080926_003037_000000542072_00245_34367_7514.N1	26-SEP-2008 00:30:37	Dark	53.500	8	10Alp CMi	0.40000	6500.0	107	34367	No
3	GOM_TRA_1PNPDE20080926_004243_000000512072_00245_34367_7651.N1	26-SEP-2008 00:42:43	Dark	50.500	23	21Eps CMa	1.5020	26000.	101	34367	No
4	GOM_TRA_1PNPDE20080926_004649_000000422072_00246_34368_7652.N1	26-SEP-2008 00:46:49	Dark	41.500	161	Tau Pup	2.9310	4500.0	83	34368	No
5	GOM_TRA_1PNPDE20080926_005924_000000482072_00246_34368_7653.N1	26-SEP-2008 00:59:24	Dark	47.500	9	Alp Eri	0.45300	24000.	95	34368	No
6	GOM_TRA_1PNPDE20080926_010453_000000422072_00246_34368_7654.N1	26-SEP-2008 01:04:53	Straylight	41.500	84	Alp Phe	2.3970	4500.0	83	34368	No
7	GOM_TRA_1PNPDE20080926_011200_000000522072_00246_34368_7655.N1	26-SEP-2008 01:12:00	Twi_and_stray	51.500	52	16Bet Cet	2.0370	4500.0	103	34368	No
8	GOM_TRA_1PNPDE20080926_012218_000000362072_00246_34368_7656.N1	26-SEP-2008 01:22:18	Bright	36.000	90	54Alp Peg	2.4870	11000.	72	34368	No
9	GOM_TRA_1PNPDE20080926_012600_000000392072_00246_34368_7657.N1	26-SEP-2008 01:26:00	Bright	39.000	93	53Bet Peg	2.5200	3100.0	78	34368	No
10	GOM_TRA_1PNPDE20080926_013542_000000392072_00246_34368_7658.N1	26-SEP-2008 01:35:42	Bright	39.000	74	11Bet Cas	2.2680	6600.0	78	34368	No
11	GOM_TRA_1PNPDE20080926_013712_000000402072_00246_34368_7659.N1	26-SEP-2008 01:37:12	Bright	39.500	76	27Gam Cas	2.3000	30000.	79	34368	No
12	GOM_TRA_1PNPDE20080926_020236_000000712072_00246_34368_7660.N1	26-SEP-2008 02:02:36	Bright	71.000	17	78Bet Gem	1.1610	4500.0	142	34368	No
13	GOM_TRA_1PNPDE20080926_021113_000000452072_00246_34368_7804.N1	26-SEP-2008 02:11:13	Dark	45.000	8	10Alp CMi	0.40000	6500.0	90	34368	Yes
14	GOM_TRA_1PNPDE20080926_022320_000000562072_00246_34368_7805.N1	26-SEP-2008 02:23:20	Dark	55.500	23	21Eps CMa	1.5020	26000.	111	34368	No
15	GOM_TRA_1PNPDE20080926_022726_000000422072_00247_34369_7806.N1	26-SEP-2008 02:27:26	Dark	42.000	161	Tau Pup	2.9310	4500.0	84	34369	No
16	GOM_TRA_1PNPDE20080926_024000_000000432072_00247_34369_7807.N1	26-SEP-2008 02:40:00	Dark	43.000	9	Alp Eri	0.45300	24000.	86	34369	No
17	GOM_TRA_1PNPDE20080926_024529_000000432072_00247_34369_7808.N1	26-SEP-2008 02:45:29	Straylight	43.000	84	Alp Phe	2.3970	4500.0	86	34369	No
18	GOM_TRA_1PNPDE20080926_025236_000000502072_00247_34369_7809.N1	26-SEP-2008 02:52:36	Twi_and_stray	50.000	52	16Bet Cet	2.0370	4500.0	100	34369	No
19	GOM_TRA_1PNPDE20080926_030254_000000372072_00247_34369_7810.N1	26-SEP-2008 03:02:54	Bright	37.000	90	54Alp Peg	2.4870	11000.	74	34369	No
20	GOM_TRA_1PNPDE20080926_030636_000000392072_00247_34369_7811.N1	26-SEP-2008 03:06:36	Bright	38.500	93	53Bet Peg	2.5200	3100.0	77	34369	No
21	GOM_TRA_1PNPDE20080926_031618_000000382072_00247_34369_7812.N1	26-SEP-2008 03:16:18	Bright	37.500	74	11Bet Cas	2.2680	6600.0	75	34369	No
22	GOM_TRA_1PNPDE20080926_031747_000000372072_00247_34369_7813.N1	26-SEP-2008 03:17:47	Bright	36.500	76	27Gam Cas	2.3000	30000.	73	34369	No
23	GOM_TRA_1PNPDE20080926_034312_000000522072_00247_34369_7917.N1	26-SEP-2008 03:43:12	Bright	51.500	17	78Bet Gem	1.1610	4500.0	103	34369	No
24	GOM_TRA_1PNPDE20080926_035150_000000452072_00247_34369_7918.N1	26-SEP-2008 03:51:50	Dark	45.000	8	10Alp CMi	0.40000	6500.0	90	34369	No
25	GOM_TRA_1PNPDE20080926_035904_000000442072_00247_34369_7919.N1	26-SEP-2008 03:59:04	Dark	44.000	132	15Rho Pup	2.8030	6900.0	88	34369	No
26	GOM_TRA_1PNPDE20080926_040226_000000462072_00247_34369_7920.N1	26-SEP-2008 04:02:26	Dark	45.500	88	31Eta CMa	2.4480	20000.	91	34369	No
27	GOM_TRA_1PNPDE20080926_040357_000000502072_00247_34369_7921.N1	26-SEP-2008 04:03:57	Dark	50.000	23	21Eps CMa	1.5020	26000.	100	34369	No
28	GOM_TRA_1PNPDE20080926_040803_000000412072_00248_34370_7922.N1	26-SEP-2008 04:08:03	Dark	41.000	161	Tau Pup	2.9310	4500.0	82	34370	No
29	GOM_TRA_1PNPDE20080926_042037_000000402072_00248_34370_7923.N1	26-SEP-2008 04:20:37	Dark	39.500	9	Alp Eri	0.45300	24000.	79	34370	No
30	GOM_TRA_1PNPDE20080926_042605_000000402072_00248_34370_7924.N1	26-SEP-2008 04:26:05	Straylight	39.500	84	Alp Phe	2.3970	4500.0	79	34370	No
31	GOM_TRA_1PNPDE20080926_043312_000000512072_00248_34370_7925.N1	26-SEP-2008 04:33:12	Twi_and_stray	51.000	52	16Bet Cet	2.0370	4500.0	102	34370	No
32	GOM_TRA_1PNPDE20080926_044330_000000362072_00248_34370_7926.N1	26-SEP-2008 04:43:30	Bright	36.000	90	54Alp Peg	2.4870	11000.	72	34370	No
33	GOM_TRA_1PNPDE20080926_044712_000000382072_00248_34370_7927.N1	26-SEP-2008 04:47:12	Bright	38.000	93	53Bet Peg	2.5200	3100.0	76	34370	No
34	GOM_TRA_1PNPDE20080926_045654_000000402072_00248_34370_7928.N1	26-SEP-2008 04:56:54	Bright	40.000	74	11Bet Cas	2.2680	6600.0	80	34370	No
35	GOM_TRA_1PNPDE20080926_045823_000000402072_00248_34370_7929.N1	26-SEP-2008 04:58:23	Bright	39.500	76	27Gam Cas	2.3000	30000.	79	34370	No
36	GOM_TRA_1PNPDE20080926_052348_000000662072_00248_34370_8078.N1	26-SEP-2008 05:23:48	Bright	65.500	17	78Bet Gem	1.1610	4500.0	131	34370	No
37	GOM_TRA_1PNPDE20080926_053227_000000362072_00248_34370_8079.N1	26-SEP-2008 05:32:27	Dark	36.000	8	10Alp CMi	0.40000	6500.0	72	34370	No
38	GOM_TRA_1PNPDE20080926_053941_000000452072_00248_34370_8080.N1	26-SEP-2008 05:39:41	Dark	44.500	132	15Rho Pup	2.8030	6900.0	89	34370	No
39	GOM_TRA_1PNPDE20080926_054302_000000472072_00248_34370_8081.N1	26-SEP-2008 05:43:02	Dark	47.000	88	31Eta CMa	2.4480	20000.	94	34370	No
40	GOM_TRA_1PNPDE20080926_054434_000000512072_00248_34370_8082.N1	26-SEP-2008 05:44:34	Dark	50.500	23	21Eps CMa	1.5020	26000.	101	34370	No
41	GOM_TRA_1PNPDE20080926_054840_000000412072_00249_34371_8083.N1	26-SEP-2008 05:48:40	Dark	40.500	161	Tau Pup	2.9310	4500.0	81	34371	No
42	GOM_TRA_1PNPDE20080926_060115_000000472072_00249_34371_8084.N1	26-SEP-2008 06:01:15	Dark	47.000	9	Alp Eri	0.45300	24000.	94	34371	No
43	GOM_TRA_1PNPDE20080926_060642_000000442072_00249_34371_8085.N1	26-SEP-2008 06:06:42	Straylight	43.500	84	Alp Phe	2.3970	4500.0	87	34371	No
44	GOM_TRA_1PNPDE20080926_061348_000000522072_00249_34371_8086.N1	26-SEP-2008 06:13:48	Twi_and_stray	51.500	52	16Bet Cet	2.0370	4500.0	103	34371	No
45	GOM_TRA_1PNPDE20080926_062406_000000362072_00249_34371_8087.N1	26-SEP-2008 06:24:06	Bright	35.500	90	54Alp Peg	2.4870	11000.	71	34371	No
46	GOM_TRA_1PNPDE20080926_062748_000000392072_00249_34371_8088.N1	26-SEP-2008 06:27:48	Bright	38.500	93	53Bet Peg	2.5200	3100.0	77	34371	No
47	GOM_TRA_1PNPDE20080926_063729_000000392072_00249_34371_8089.N1	26-SEP-2008 06:37:29	Bright	38.500	74	11Bet Cas	2.2680	6600.0	77	34371	No
48	GOM_TRA_1PNPDE20080926_063858_000000412072_00249_34371_8090.N1	26-SEP-2008 06:38:58	Bright	40.500	76	27Gam Cas	2.3000	30000.	81	34371	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:	31.9149 %
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:	19.051	18.918	NaN
St. deviation:	9.4238	5.6382	NaN
Maximum:	52.238	29.906	NaN
Minimum:	7.1622	4.2385	NaN
Number of data:	19.000	20.000	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:	0.24532	-1.1543	0.24784	-1.2736
St. deviation:	0.45874	0.63486	0.60660	0.77287
Maximum:	8.7000	7.2000	4.2000	2.8000
Minimum:	-9.7000	-7.9000	-4.0000	-6.0000
Number of data:	19750.	19750.	18450.	18450.

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	26-SEP-2008 00:22:00
CALIBRATION_DATABASE	GOM_CAL_AXVIEC20080922_092941_20080919_000000_20100101_000000	1	26-SEP-2008 00:22:00
LEVEL-1B_PROC_CONFIG	GOM_PR1_AXNIEC20050627_151042_20020301_000000_20100101_000000	1	26-SEP-2008 00:22:00
STAR_CATALOGUE	GOM_CAT_AXVIEC20020121_161009_20020101_000000_20200101_000000	1	26-SEP-2008 00:22:00
STELLAR_SPECTRA_DATABANK	GOM_STS_AXNIEC20040308_103538_20020101_160000_20100101_000000	1	26-SEP-2008 00:22:00
ECMWF_FILE	AUX_ECF_AXNECM20080925_072112_20080925_210000_20080926_090000	1	26-SEP-2008 00:22:00
ECMWF_FILE	AUX_ECF_AXNECM20080925_190112_20080926_030000_20080926_150000	23	26-SEP-2008 03:43:12
OPTIONAL_ECMWF_FILE	MISSING	1	26-SEP-2008 00:22:00
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20080925_210544_000060572072_00243_34365_6432.N1	1	26-SEP-2008 00:22:00
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20080925_225200_000057382072_00244_34366_6433.N1	3	26-SEP-2008 00:42:43
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20080926_003257_000054192072_00245_34367_6434.N1	13	26-SEP-2008 02:11:13
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20080926_020835_000041442072_00246_34368_6435.N1	23	26-SEP-2008 03:43:12
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20080926_032258_000057382072_00247_34369_6436.N1	36	26-SEP-2008 05:23:48

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