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	16MAR2012 07:00:59
Data source version	GOMOS/6.01
Start time of products	13MAR2012 01:20:59
Stop time of products	13MAR2012 23:10:34
Store outputs in DB	Yes
Nb of level 1b prods	13
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

!Warning: No products without errors in BRIGHT limb contitions found

Nr	Filename	UTC Start time	Limb	Duration	Star Id	Star Name	Star Mag	Star Temp	Nb Meas	Orbit	Prod. error
1	GOM_TRA_1PNPDE20120313_012059_000000443112_00319_52488_8388.N1	13-MAR-2012 01:20:59	Dark	44.000	141	Bet Ara	2.8400	4600.0	88	52488	No
2	GOM_TRA_1PNPDE20120313_030114_000000423112_00320_52489_8389.N1	13-MAR-2012 03:01:14	Dark	41.500	141	Bet Ara	2.8400	4600.0	83	52489	Yes
3	GOM_TRA_1PNPDE20120313_044128_000000403112_00321_52490_8432.N1	13-MAR-2012 04:41:28	Dark	39.500	141	Bet Ara	2.8400	4600.0	79	52490	No
4	GOM_TRA_1PNPDE20120313_062143_000000383112_00322_52491_8497.N1	13-MAR-2012 06:21:43	Dark	37.500	141	Bet Ara	2.8400	4600.0	75	52491	No
5	GOM_TRA_1PNPDK20120313_080158_000000373112_00323_52492_3617.N1	13-MAR-2012 08:01:58	Dark	36.500	141	Bet Ara	2.8400	4600.0	73	52492	No
6	GOM_TRA_1PNPDK20120313_112853_000000473112_00325_52494_3683.N1	13-MAR-2012 11:28:53	Dark	47.000	4	Alp1Cen	-0.010000	5800.0	94	52494	No
7	GOM_TRA_1PNPDK20120313_130907_000000423112_00326_52495_3744.N1	13-MAR-2012 13:09:07	Dark	41.500	4	Alp1Cen	-0.010000	5800.0	83	52495	No
8	GOM_TRA_1PNPDK20120313_144922_000000423112_00327_52496_3794.N1	13-MAR-2012 14:49:22	Dark	42.000	4	Alp1Cen	-0.010000	5800.0	84	52496	No
9	GOM_TRA_1PNPDK20120313_162936_000000493112_00328_52497_3829.N1	13-MAR-2012 16:29:36	Dark	49.000	4	Alp1Cen	-0.010000	5800.0	98	52497	No
10	GOM_TRA_1PNPDK20120313_180951_000000443112_00329_52498_3857.N1	13-MAR-2012 18:09:51	Dark	44.000	4	Alp1Cen	-0.010000	5800.0	88	52498	No
11	GOM_TRA_1PNPDK20120313_195005_000000573112_00330_52499_3891.N1	13-MAR-2012 19:50:05	Dark	56.500	4	Alp1Cen	-0.010000	5800.0	113	52499	No
12	GOM_TRA_1PNPDE20120313_213020_000000453112_00331_52500_8704.N1	13-MAR-2012 21:30:20	Dark	45.000	4	Alp1Cen	-0.010000	5800.0	90	52500	No
13	GOM_TRA_1PNPDE20120313_231034_000000503112_00332_52501_8735.N1	13-MAR-2012 23:10:34	Dark	49.500	4	Alp1Cen	-0.010000	5800.0	99	52501	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 These products did not use the DSA observation for DC computation:

Product name	DC information
GOM_TRA_1PNPDE20120313_012059_000000443112_00319_52488_8388.N1	DC map used
GOM_TRA_1PNPDE20120313_030114_000000423112_00320_52489_8389.N1	DC map used
GOM_TRA_1PNPDE20120313_044128_000000403112_00321_52490_8432.N1	DC map used
GOM_TRA_1PNPDE20120313_062143_000000383112_00322_52491_8497.N1	DC map used
GOM_TRA_1PNPDK20120313_080158_000000373112_00323_52492_3617.N1	DC map used

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:	100.000 %
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:	15.900	NaN	NaN
St. deviation:	7.3148	NaN	NaN
Maximum:	28.591	NaN	NaN
Minimum:	3.4270	NaN	NaN
Number of data:	12.000	NaN	NaN

6.2 Plot for DARK 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:	0.15911	-0.32492	NaN	NaN
St. deviation:	0.22674	0.41843	NaN	NaN
Maximum:	1.9000	1.8000	NaN	NaN
Minimum:	-1.3000	-3.8000	NaN	NaN
Number of data:	11600.	11600.	NaN	NaN
90Percentile:	0.40000	0.10000	NaN	NaN

7.2.2 Trend of daily SATU NEA St. deviation since 1st April 2006 (dark limb) and of daily SATU NEA 90th percentile since May 2011

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

Lower curve: 90th percentile of SATU Y axis
Upper curve: 90th percentile 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_AXVIEC20111213_163131_20111215_000000_20500101_000000	1	13-MAR-2012 01:20:59
CALIBRATION_DATABASE	GOM_CAL_AXVIEC20120307_084038_20120305_000000_20500101_000000	1	13-MAR-2012 01:20:59
LEVEL-1B_PROC_CONFIG	GOM_PR1_AXVIEC20110513_081743_20020301_000000_20500101_000000	1	13-MAR-2012 01:20:59
STAR_CATALOGUE	GOM_CAT_AXVIEC20020121_161009_20020101_000000_20200101_000000	1	13-MAR-2012 01:20:59
STELLAR_SPECTRA_DATABANK	GOM_STS_AXVIEC20091111_151504_20020101_160000_20500101_000000	1	13-MAR-2012 01:20:59
ECMWF_FILE	AUX_ECF_AXNECM20120312_060209_20120312_210000_20120313_090000	1	13-MAR-2012 01:20:59
ECMWF_FILE	AUX_ECF_AXNECM20120312_183628_20120313_030000_20120313_150000	3	13-MAR-2012 04:41:28
ECMWF_FILE	AUX_ECA_AXNECM20120313_062945_20120312_210000_20120313_090000	4	13-MAR-2012 06:21:43
ECMWF_FILE	AUX_ECF_AXNECM20120313_062946_20120313_090000_20120313_210000	6	13-MAR-2012 11:28:53
ECMWF_FILE	AUX_ECF_AXNECM20120313_062946_20120313_150000_20120314_030000	9	13-MAR-2012 16:29:36
ECMWF_FILE	AUX_ECA_AXNECM20120313_174944_20120313_090000_20120313_210000	11	13-MAR-2012 19:50:05
ECMWF_FILE	AUX_ECF_AXNECM20120313_064943_20120313_210000_20120314_090000	12	13-MAR-2012 21:30:20
OPTIONAL_ECMWF_FILE	MISSING	1	13-MAR-2012 01:20:59
ORBIT_DATA_FILE	AUX_FPO_AXVPDS20120312_231630_20120311_191412_20120321_212753	1	13-MAR-2012 01:20:59
ORBIT_DATA_FILE	AUX_FPO_AXVPDS20120313_112944_20120312_183727_20120322_205108	6	13-MAR-2012 11:28:53
ORBIT_DATA_FILE	AUX_FPO_AXVPDS20120313_232943_20120313_194056_20120323_201423	13	13-MAR-2012 23:10:34

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