GOMOS Daily Report 05-MAR-2012


Level 0 and Level 1 products

SUMMARY

1. General Info

 
2. Summary of products arrived in PCF (Product Control Facility)
2.1 Level 0: products arrived in PCF during current month (see template here)
2.2 Level 0: plot of mission plan versus production during reporting period
2.3 Level 0: summary of missing occultations with respect to the plan
2.4 Level 1: products arrived in PCF during reporting period

 
3. Plot of Spectrometers and Photometers temperatures

 
4. Dark Charge monitoring
4.1 Products that did not use the Dark Sky Area observation for DC computation
4.2 Plot of Dark Charge

 
5. Demodulation correction and quality product information monitoring
5.1 Percentage of products with some flags set
5.2 Plot of quality information per product (time dependant)
5.3 Plot of quality information per product (world map)

 
6. Star tangent altitude lost
6.1 Statistics on star tangent altitude lost
6.2 Plot of star tangent altitude lost: DARK products
6.3 Plot of star tangent altitude lost: BRIGHT products
6.3 Plot of star tangent altitude lost: TWILIGHT products

 
7. Star Acquisition and Tracking Unit (SATU)
7.1 SATU plots (dark limb): 'X' and 'Y' axis
7.2 SATU Noise Equivalent Angle statistics
7.2.1 SATU NEA Statistics (table)
7.2.2 Daily SATU NEA STD (dark limb) - trend since 1st April 2006

 
8.Auxiliary Data Files used for the production reported in section 2.4

 


Level 2 products




 

1. General Info

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
07MAR2012 07:00:53
Data source version
GOMOS/6.01
Start time of products
05MAR2012 00:51:38
Stop time of products
05MAR2012 23:09:37
Store outputs in DB
Yes
Nb of level 1b prods
21
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)

UTC start time Star name Star ID Orbit
05-MAR-2012 00:51:37
50GamAql
118
52386

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_1PNPDE20120305_005138_000000403112_00203_52372_5219.N1
05-MAR-2012 00:51:38
Bright
40.000
118
50Gam Aql
2.7180
4600.0
80
52372
No
2
GOM_TRA_1PNPDE20120305_012630_000000413112_00204_52373_5277.N1
05-MAR-2012 01:26:30
Dark
41.000
99
Del Cen
2.5750
26000.
82
52373
No
3
GOM_TRA_1PNPDE20120305_023153_000000393112_00204_52373_5278.N1
05-MAR-2012 02:31:53
Bright
38.500
118
50Gam Aql
2.7180
4600.0
77
52373
No
4
GOM_TRA_1PNPDE20120305_030644_000000403112_00205_52374_5279.N1
05-MAR-2012 03:06:44
Dark
40.000
99
Del Cen
2.5750
26000.
80
52374
No
5
GOM_TRA_1PNPDE20120305_041207_000000373112_00205_52374_5323.N1
05-MAR-2012 04:12:07
Bright
37.000
118
50Gam Aql
2.7180
4600.0
74
52374
No
6
GOM_TRA_1PNPDE20120305_044658_000000413112_00206_52375_5324.N1
05-MAR-2012 04:46:58
Dark
41.000
99
Del Cen
2.5750
26000.
82
52375
No
7
GOM_TRA_1PNPDE20120305_055221_000000263112_00206_52375_5371.N1
05-MAR-2012 05:52:21
Twi_and_stray
26.000
118
50Gam Aql
2.7180
4600.0
52
52375
No
8
GOM_TRA_1PNPDE20120305_062713_000000433112_00207_52376_5372.N1
05-MAR-2012 06:27:13
Straylight
42.500
99
Del Cen
2.5750
26000.
85
52376
No
9
GOM_TRA_1PNPDK20120305_080727_000000413112_00208_52377_9943.N1
05-MAR-2012 08:07:27
Straylight
41.000
99
Del Cen
2.5750
26000.
82
52377
No
10
GOM_TRA_1PNPDK20120305_094742_000000443112_00209_52378_9977.N1
05-MAR-2012 09:47:42
Straylight
43.500
99
Del Cen
2.5750
26000.
87
52378
No
11
GOM_TRA_1PNPDK20120305_112756_000000403112_00210_52379_0015.N1
05-MAR-2012 11:27:56
Straylight
39.500
99
Del Cen
2.5750
26000.
79
52379
No
12
GOM_TRA_1PNPDK20120305_130810_000000393112_00211_52380_0057.N1
05-MAR-2012 13:08:10
Straylight
38.500
99
Del Cen
2.5750
26000.
77
52380
No
13
GOM_TRA_1PNPDK20120305_144825_000000393112_00212_52381_0105.N1
05-MAR-2012 14:48:25
Straylight
39.000
99
Del Cen
2.5750
26000.
78
52381
No
14
GOM_TRA_1PNPDK20120305_162839_000000403112_00213_52382_0133.N1
05-MAR-2012 16:28:39
Straylight
39.500
99
Del Cen
2.5750
26000.
79
52382
No
15
GOM_TRA_1PNPDK20120305_180854_000000403112_00214_52383_0154.N1
05-MAR-2012 18:08:54
Straylight
39.500
99
Del Cen
2.5750
26000.
79
52383
No
16
GOM_TRA_1PNPDK20120305_191440_000000443112_00214_52383_0181.N1
05-MAR-2012 19:14:40
Bright
43.500
11
53Alp Aql
0.76500
8000.0
87
52383
No
17
GOM_TRA_1PNPDK20120305_192643_000000433112_00214_52383_0182.N1
05-MAR-2012 19:26:43
Dark
43.000
103
38Zet Sgr
2.6000
9700.0
86
52383
No
18
GOM_TRA_1PNPDK20120305_194908_000000403112_00215_52384_0183.N1
05-MAR-2012 19:49:08
Straylight
39.500
99
Del Cen
2.5750
26000.
79
52384
No
19
GOM_TRA_1PNPDE20120305_205455_000000413112_00215_52384_5555.N1
05-MAR-2012 20:54:55
Bright
40.500
11
53Alp Aql
0.76500
8000.0
81
52384
No
20
GOM_TRA_1PNPDE20120305_210657_000000403112_00215_52384_5580.N1
05-MAR-2012 21:06:57
Dark
39.500
103
38Zet Sgr
2.6000
9700.0
79
52384
No
21
GOM_TRA_1PNPDE20120305_230937_000000423112_00217_52386_5602.N1
05-MAR-2012 23:09:37
Straylight
42.000
99
Del Cen
2.5750
26000.
84
52386
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_1PNPDE20120305_005138_000000403112_00203_52372_5219.N1
DC map used
GOM_TRA_1PNPDE20120305_012630_000000413112_00204_52373_5277.N1
DC map used
GOM_TRA_1PNPDE20120305_023153_000000393112_00204_52373_5278.N1
DC map used
GOM_TRA_1PNPDE20120305_030644_000000403112_00205_52374_5279.N1
DC map used
GOM_TRA_1PNPDE20120305_041207_000000373112_00205_52374_5323.N1
DC map used
GOM_TRA_1PNPDE20120305_044658_000000413112_00206_52375_5324.N1
DC map used
GOM_TRA_1PNPDE20120305_055221_000000263112_00206_52375_5371.N1
DC map used
GOM_TRA_1PNPDE20120305_062713_000000433112_00207_52376_5372.N1
DC map used
GOM_TRA_1PNPDK20120305_080727_000000413112_00208_52377_9943.N1
DC map used
GOM_TRA_1PNPDK20120305_094742_000000443112_00209_52378_9977.N1
DC map used
GOM_TRA_1PNPDK20120305_112756_000000403112_00210_52379_0015.N1
DC map used
GOM_TRA_1PNPDK20120305_130810_000000393112_00211_52380_0057.N1
DC map used
GOM_TRA_1PNPDK20120305_144825_000000393112_00212_52381_0105.N1
DC map used
GOM_TRA_1PNPDK20120305_162839_000000403112_00213_52382_0133.N1
DC map used
GOM_TRA_1PNPDK20120305_180854_000000403112_00214_52383_0154.N1
DC map used
GOM_TRA_1PNPDK20120305_191440_000000443112_00214_52383_0181.N1
DC map used
GOM_TRA_1PNPDK20120305_192643_000000433112_00214_52383_0182.N1
DC map used
GOM_TRA_1PNPDK20120305_194908_000000403112_00215_52384_0183.N1
DC map used
GOM_TRA_1PNPDE20120305_205455_000000413112_00215_52384_5555.N1
DC map used
GOM_TRA_1PNPDE20120305_210657_000000403112_00215_52384_5580.N1
DC map used
GOM_TRA_1PNPDE20120305_230937_000000423112_00217_52386_5602.N1
DC map used

4.2 Plot of mean dark charges per product: only products in DARK limb conditions without errors are used

qds_image


 

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:
61.9048 %
Reference spectrum computed from DB:
0.00000 %
Reference spectrum with small number of measurements:
0.00000 %
SATU data not used:
23.8095 %

 

5.2 Plot quality information per product (time dependant)

qds_image


 

5.3 Plot quality information per product (world map)

qds_image


 

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:
18.739
18.322
NaN
St. deviation:
1.8468
3.9932
NaN
Maximum:
20.776
23.704
NaN
Minimum:
16.024
12.968
NaN
Number of data:
5.0000
5.0000
NaN

 

6.2 Plot for DARK limb products

qds_image


 

6.3 Plot for BRIGHT limb products

qds_image


 

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

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:
0.13228
-0.22349
0.11213
-0.13364
St. deviation:
0.91031
1.0210
0.34723
0.50775
Maximum:
3.5000
3.2000
1.4000
3.1000
Minimum:
-3.1000
-3.6000
-1.4000
-2.5000
Number of data:
4800.0
4800.0
4650.0
4650.0
90Percentile:
1.3000
1.1000
0.60000
0.50000

 

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
05-MAR-2012 00:51:38
CALIBRATION_DATABASE
GOM_CAL_AXVIEC20120130_103112_20120125_000000_20500101_000000
1
05-MAR-2012 00:51:38
LEVEL-1B_PROC_CONFIG
GOM_PR1_AXVIEC20110513_081743_20020301_000000_20500101_000000
1
05-MAR-2012 00:51:38
STAR_CATALOGUE
GOM_CAT_AXVIEC20020121_161009_20020101_000000_20200101_000000
1
05-MAR-2012 00:51:38
STELLAR_SPECTRA_DATABANK
GOM_STS_AXVIEC20091111_151504_20020101_160000_20500101_000000
1
05-MAR-2012 00:51:38
ECMWF_FILE
AUX_ECF_AXNECM20120304_062616_20120304_210000_20120305_090000
1
05-MAR-2012 00:51:38
ECMWF_FILE
AUX_ECF_AXNECM20120304_182614_20120305_030000_20120305_150000
5
05-MAR-2012 04:12:07
ECMWF_FILE
AUX_ECA_AXNECM20120305_062113_20120304_210000_20120305_090000
7
05-MAR-2012 05:52:21
ECMWF_FILE
AUX_ECF_AXNECM20120305_062114_20120305_090000_20120305_210000
10
05-MAR-2012 09:47:42
ECMWF_FILE
AUX_ECF_AXNECM20120305_062114_20120305_150000_20120306_030000
14
05-MAR-2012 16:28:39
ECMWF_FILE
AUX_ECA_AXNECM20120305_185155_20120305_090000_20120305_210000
16
05-MAR-2012 19:14:40
ECMWF_FILE
AUX_ECF_AXNECM20120305_062115_20120305_210000_20120306_090000
20
05-MAR-2012 21:06:57
OPTIONAL_ECMWF_FILE
MISSING
1
05-MAR-2012 00:51:38
ORBIT_DATA_FILE
AUX_FPO_AXVPDS20120302_232834_20120301_184045_20120311_205427
1
05-MAR-2012 00:51:38
ORBIT_DATA_FILE
AUX_FPO_AXVPDS20120305_233155_20120305_193414_20120315_200740
21
05-MAR-2012 23:09:37