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	23OCT2008 05:43:37
Data source version	GOMOS/5.00
Start time of products	21OCT2008 00:00:03
Stop time of products	21OCT2008 04:28:30
Store outputs in DB	Yes
Nb of level 1b prods	50
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_1PNPDE20081021_000003_000000372073_00102_34725_1424.N1	21-OCT-2008 00:00:03	Bright	36.500	58	21Alp And	2.0730	11000.	73	34725	No
2	GOM_TRA_1PNPDE20081021_000212_000000392073_00102_34725_1425.N1	21-OCT-2008 00:02:12	Bright	39.000	53	43Bet And	2.0480	3300.0	78	34725	No
3	GOM_TRA_1PNPDE20081021_000753_000000412073_00102_34725_1426.N1	21-OCT-2008 00:07:53	Bright	41.000	68	18Alp Cas	2.2250	4500.0	82	34725	No
4	GOM_TRA_1PNPDE20081021_000912_000000362073_00102_34725_1427.N1	21-OCT-2008 00:09:12	Bright	36.000	76	27Gam Cas	2.3000	30000.	72	34725	No
5	GOM_TRA_1PNPDE20081021_001703_000000342073_00102_34725_1428.N1	21-OCT-2008 00:17:03	Bright	34.000	49	1Alp UMi	1.9900	6300.0	68	34725	No
6	GOM_TRA_1PNPDE20081021_002518_000000382073_00102_34725_1429.N1	21-OCT-2008 00:25:18	Bright	37.500	36	50Alp UMa	1.8000	6300.0	75	34725	No
7	GOM_TRA_1PNPDE20081021_002653_000000532073_00102_34725_1430.N1	21-OCT-2008 00:26:53	Bright	53.000	82	48Bet UMa	2.3650	10600.	106	34725	No
8	GOM_TRA_1PNPDE20081021_003021_000000532073_00102_34725_1431.N1	21-OCT-2008 00:30:21	Bright	53.000	174	52Psi UMa	3.0040	4400.0	106	34725	No
9	GOM_TRA_1PNPDE20081021_003815_000000422073_00102_34725_1432.N1	21-OCT-2008 00:38:15	Bright	41.500	51	41Gam1Leo	2.0100	4500.0	83	34725	No
10	GOM_TRA_1PNPDE20081021_004058_000000412073_00102_34725_1433.N1	21-OCT-2008 00:40:58	Bright	41.000	22	32Alp Leo	1.3600	15200.	82	34725	No
11	GOM_TRA_1PNPDE20081021_005815_000000482073_00102_34725_1578.N1	21-OCT-2008 00:58:15	Dark	48.000	65	Lam Vel	2.2040	4400.0	96	34725	No
12	GOM_TRA_1PNPDE20081021_010114_000000412073_00103_34726_1579.N1	21-OCT-2008 01:01:14	Dark	40.500	46	Del Vel	1.9540	10600.	81	34726	No
13	GOM_TRA_1PNPDE20081021_010244_000000402073_00103_34726_1580.N1	21-OCT-2008 01:02:44	Dark	39.500	41	Eps Car	1.8600	4100.0	79	34726	No
14	GOM_TRA_1PNPDE20081021_010716_000000502073_00103_34726_1581.N1	21-OCT-2008 01:07:16	Dark	50.000	2	Alp Car	-0.73600	7000.0	100	34726	No
15	GOM_TRA_1PNPDE20081021_011420_000000382073_00103_34726_1582.N1	21-OCT-2008 01:14:20	Dark	37.500	143	Alp Hyi	2.8570	7200.0	75	34726	No
16	GOM_TRA_1PNPDE20081021_011545_000000402073_00103_34726_1583.N1	21-OCT-2008 01:15:45	Dark	40.000	9	Alp Eri	0.45300	24000.	80	34726	No
17	GOM_TRA_1PNPDE20081021_011836_000000422073_00103_34726_1584.N1	21-OCT-2008 01:18:36	Straylight	42.000	157	The1Eri	2.9060	9300.0	84	34726	No
18	GOM_TRA_1PNPDE20081021_012713_000000412073_00103_34726_1585.N1	21-OCT-2008 01:27:13	Straylight	40.500	52	16Bet Cet	2.0370	4500.0	81	34726	No
19	GOM_TRA_1PNPDE20081021_013644_000000362073_00103_34726_1586.N1	21-OCT-2008 01:36:44	Bright	36.000	140	88Gam Peg	2.8340	26000.	72	34726	No
20	GOM_TRA_1PNPDE20081021_014039_000000372073_00103_34726_1587.N1	21-OCT-2008 01:40:39	Bright	36.500	58	21Alp And	2.0730	11000.	73	34726	No
21	GOM_TRA_1PNPDE20081021_014248_000000402073_00103_34726_1588.N1	21-OCT-2008 01:42:48	Bright	40.000	53	43Bet And	2.0480	3300.0	80	34726	No
22	GOM_TRA_1PNPDE20081021_014829_000000362073_00103_34726_1589.N1	21-OCT-2008 01:48:29	Bright	35.500	68	18Alp Cas	2.2250	4500.0	71	34726	No
23	GOM_TRA_1PNPDE20081021_014947_000000372073_00103_34726_1590.N1	21-OCT-2008 01:49:47	Bright	37.000	76	27Gam Cas	2.3000	30000.	74	34726	No
24	GOM_TRA_1PNPDE20081021_015739_000000342073_00103_34726_1591.N1	21-OCT-2008 01:57:39	Bright	33.500	49	1Alp UMi	1.9900	6300.0	67	34726	No
25	GOM_TRA_1PNPDE20081021_020554_000000382073_00103_34726_1592.N1	21-OCT-2008 02:05:54	Bright	38.000	36	50Alp UMa	1.8000	6300.0	76	34726	No
26	GOM_TRA_1PNPDE20081021_020729_000000372073_00103_34726_1593.N1	21-OCT-2008 02:07:29	Bright	37.000	82	48Bet UMa	2.3650	10600.	74	34726	No
27	GOM_TRA_1PNPDE20081021_021057_000000362073_00103_34726_1594.N1	21-OCT-2008 02:10:57	Bright	35.500	174	52Psi UMa	3.0040	4400.0	71	34726	No
28	GOM_TRA_1PNPDE20081021_021852_000000402073_00103_34726_1595.N1	21-OCT-2008 02:18:52	Bright	39.500	51	41Gam1Leo	2.0100	4500.0	79	34726	No
29	GOM_TRA_1PNPDE20081021_022134_000000492073_00103_34726_1596.N1	21-OCT-2008 02:21:34	Bright	48.500	22	32Alp Leo	1.3600	15200.	97	34726	No
30	GOM_TRA_1PNPDE20081021_023852_000000562073_00103_34726_1710.N1	21-OCT-2008 02:38:52	Dark	55.500	65	Lam Vel	2.2040	4400.0	111	34726	No
31	GOM_TRA_1PNPDE20081021_024320_000000492073_00104_34727_1711.N1	21-OCT-2008 02:43:20	Dark	49.000	41	Eps Car	1.8600	4100.0	98	34727	No
32	GOM_TRA_1PNPDE20081021_024753_000000512073_00104_34727_1712.N1	21-OCT-2008 02:47:53	Dark	50.500	2	Alp Car	-0.73600	7000.0	101	34727	No
33	GOM_TRA_1PNPDE20081021_025456_000000382073_00104_34727_1713.N1	21-OCT-2008 02:54:56	Dark	38.000	143	Alp Hyi	2.8570	7200.0	76	34727	No
34	GOM_TRA_1PNPDE20081021_025621_000000512073_00104_34727_1714.N1	21-OCT-2008 02:56:21	Dark	50.500	9	Alp Eri	0.45300	24000.	101	34727	No
35	GOM_TRA_1PNPDE20081021_025913_000000442073_00104_34727_1715.N1	21-OCT-2008 02:59:13	Straylight	43.500	157	The1Eri	2.9060	9300.0	87	34727	No
36	GOM_TRA_1PNPDE20081021_030749_000000442073_00104_34727_1716.N1	21-OCT-2008 03:07:49	Straylight	44.000	52	16Bet Cet	2.0370	4500.0	88	34727	No
37	GOM_TRA_1PNPDE20081021_031720_000000362073_00104_34727_1717.N1	21-OCT-2008 03:17:20	Bright	35.500	140	88Gam Peg	2.8340	26000.	71	34727	No
38	GOM_TRA_1PNPDE20081021_032115_000000372073_00104_34727_1718.N1	21-OCT-2008 03:21:15	Bright	37.000	58	21Alp And	2.0730	11000.	74	34727	No
39	GOM_TRA_1PNPDE20081021_032323_000000412073_00104_34727_1719.N1	21-OCT-2008 03:23:23	Bright	40.500	53	43Bet And	2.0480	3300.0	81	34727	No
40	GOM_TRA_1PNPDE20081021_032905_000000352073_00104_34727_1720.N1	21-OCT-2008 03:29:05	Bright	35.000	68	18Alp Cas	2.2250	4500.0	70	34727	No
41	GOM_TRA_1PNPDE20081021_033023_000000372073_00104_34727_1721.N1	21-OCT-2008 03:30:23	Bright	37.000	76	27Gam Cas	2.3000	30000.	74	34727	No
42	GOM_TRA_1PNPDE20081021_033815_000000342073_00104_34727_1722.N1	21-OCT-2008 03:38:15	Bright	33.500	49	1Alp UMi	1.9900	6300.0	67	34727	No
43	GOM_TRA_1PNPDE20081021_034630_000000372073_00104_34727_1887.N1	21-OCT-2008 03:46:30	Bright	36.500	36	50Alp UMa	1.8000	6300.0	73	34727	No
44	GOM_TRA_1PNPDE20081021_034805_000000372073_00104_34727_1888.N1	21-OCT-2008 03:48:05	Bright	37.000	82	48Bet UMa	2.3650	10600.	74	34727	No
45	GOM_TRA_1PNPDE20081021_035133_000000352073_00104_34727_1889.N1	21-OCT-2008 03:51:33	Bright	34.500	174	52Psi UMa	3.0040	4400.0	69	34727	No
46	GOM_TRA_1PNPDE20081021_035928_000000452073_00104_34727_1890.N1	21-OCT-2008 03:59:28	Bright	45.000	51	41Gam1Leo	2.0100	4500.0	90	34727	No
47	GOM_TRA_1PNPDE20081021_040211_000000532073_00104_34727_1891.N1	21-OCT-2008 04:02:11	Bright	53.000	22	32Alp Leo	1.3600	15200.	106	34727	No
48	GOM_TRA_1PNPDE20081021_041929_000000432073_00104_34727_1892.N1	21-OCT-2008 04:19:29	Dark	42.500	65	Lam Vel	2.2040	4400.0	85	34727	No
49	GOM_TRA_1PNPDE20081021_042357_000000492073_00105_34728_1893.N1	21-OCT-2008 04:23:57	Dark	49.000	41	Eps Car	1.8600	4100.0	98	34728	No
50	GOM_TRA_1PNPDE20081021_042830_000000482073_00105_34728_1894.N1	21-OCT-2008 04:28:30	Dark	47.500	2	Alp Car	-0.73600	7000.0	95	34728	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:	30.0000 %
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:	12.880	18.904	NaN
St. deviation:	5.2597	5.3892	NaN
Maximum:	18.729	26.154	NaN
Minimum:	4.4018	4.0857	NaN
Number of data:	14.000	32.000	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:	0.13596	-1.2467	0.11351	-1.3155
St. deviation:	0.30364	0.52950	0.61778	0.79679
Maximum:	2.8000	1.9000	5.5000	3.7000
Minimum:	-2.9000	-5.4000	-5.0000	-8.5000
Number of data:	13000.	13000.	27200.	27200.

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	21-OCT-2008 00:00:03
CALIBRATION_DATABASE	GOM_CAL_AXVIEC20081016_095516_20081014_000000_20100101_000000	1	21-OCT-2008 00:00:03
LEVEL-1B_PROC_CONFIG	GOM_PR1_AXNIEC20050627_151042_20020301_000000_20100101_000000	1	21-OCT-2008 00:00:03
STAR_CATALOGUE	GOM_CAT_AXVIEC20020121_161009_20020101_000000_20200101_000000	1	21-OCT-2008 00:00:03
STELLAR_SPECTRA_DATABANK	GOM_STS_AXNIEC20040308_103538_20020101_160000_20100101_000000	1	21-OCT-2008 00:00:03
ECMWF_FILE	AUX_ECF_AXNECM20081020_072111_20081020_210000_20081021_090000	1	21-OCT-2008 00:00:03
ECMWF_FILE	AUX_ECF_AXNECM20081020_192111_20081021_030000_20081021_150000	43	21-OCT-2008 03:46:30
OPTIONAL_ECMWF_FILE	MISSING	1	21-OCT-2008 00:00:03
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20081020_212352_000057382073_00100_34723_6600.N1	1	21-OCT-2008 00:00:03
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20081020_230449_000057382073_00101_34724_6601.N1	11	21-OCT-2008 00:58:15
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20081021_004546_000054192073_00102_34725_6602.N1	30	21-OCT-2008 02:38:52
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20081021_022125_000041442073_00103_34726_6603.N1	43	21-OCT-2008 03:46:30

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