GOMOS Daily Report 03-APR-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
06APR2012 07:01:27
Data source version
GOMOS/6.01
Start time of products
03APR2012 08:53:48
Stop time of products
03APR2012 23:55:55
Store outputs in DB
Yes
Nb of level 1b prods
21
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
03-APR-2012 13:53:48
9BetCrv
0
52797
03-APR-2012 14:16:25
64GamUMa
0
52797
03-APR-2012 15:34:03
9BetCrv
0
52798
03-APR-2012 15:56:39
64GamUMa
0
52798
03-APR-2012 17:14:17
9BetCrv
0
52799
03-APR-2012 17:36:52
64GamUMa
0
52799
03-APR-2012 18:54:31
9BetCrv
0
52800
03-APR-2012 19:17:06
64GamUMa
0
52800
03-APR-2012 19:50:32
8EpsPeg
0
52800
03-APR-2012 20:34:45
9BetCrv
0
52801
03-APR-2012 20:57:20
64GamUMa
0
52801
03-APR-2012 21:30:46
8EpsPeg
0
52801
03-APR-2012 21:35:28
22BetAqr
0
52801
03-APR-2012 22:14:59
9BetCrv
0
52802
03-APR-2012 22:37:34
64GamUMa
0
52802
03-APR-2012 23:11:00
8EpsPeg
0
52802
03-APR-2012 23:15:42
22BetAqr
0
52802
03-APR-2012 23:55:13
9BetCrv
0
52803

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_1PNPDK20120403_085348_000000253113_00194_52794_3025.N1
03-APR-2012 08:53:48
Twi_and_stray
24.500
106
9Bet Crv
2.6480
5600.0
49
52794
No
2
GOM_TRA_1PNPDK20120403_103403_000000303113_00195_52795_3068.N1
03-APR-2012 10:34:03
Twi_and_stray
29.500
106
9Bet Crv
2.6480
5600.0
59
52795
No
3
GOM_TRA_1PNPDK20120403_121417_000000343113_00196_52796_3113.N1
03-APR-2012 12:14:17
Twi_and_stray
33.500
106
9Bet Crv
2.6480
5600.0
67
52796
No
4
GOM_TRA_1PNPDK20120403_135431_000000393113_00197_52797_3206.N1
03-APR-2012 13:54:31
Twi_and_stray
39.000
106
9Bet Crv
2.6480
5600.0
78
52797
Yes
5
GOM_TRA_1PNPDK20120403_141707_000000273113_00197_52797_3207.N1
03-APR-2012 14:17:07
Twi_and_stray
26.500
87
64Gam UMa
2.4330
11000.
53
52797
No
6
GOM_TRA_1PNPDK20120403_153445_000000433113_00198_52798_3228.N1
03-APR-2012 15:34:45
Twi_and_stray
43.000
106
9Bet Crv
2.6480
5600.0
86
52798
No
7
GOM_TRA_1PNPDK20120403_155721_000000323113_00198_52798_3229.N1
03-APR-2012 15:57:21
Bright
31.500
87
64Gam UMa
2.4330
11000.
63
52798
No
8
GOM_TRA_1PNPDK20120403_171459_000000433113_00199_52799_3272.N1
03-APR-2012 17:14:59
Twi_and_stray
43.000
106
9Bet Crv
2.6480
5600.0
86
52799
No
9
GOM_TRA_1PNPDK20120403_173735_000000373113_00199_52799_3273.N1
03-APR-2012 17:37:35
Bright
36.500
87
64Gam UMa
2.4330
11000.
73
52799
No
10
GOM_TRA_1PNPDK20120403_185513_000000453113_00200_52800_3303.N1
03-APR-2012 18:55:13
Twi_and_stray
44.500
106
9Bet Crv
2.6480
5600.0
89
52800
No
11
GOM_TRA_1PNPDK20120403_191748_000000393113_00200_52800_3304.N1
03-APR-2012 19:17:48
Bright
39.000
87
64Gam UMa
2.4330
11000.
78
52800
No
12
GOM_TRA_1PNPDK20120403_195114_000000463113_00200_52800_3305.N1
03-APR-2012 19:51:14
Twi_and_stray
45.500
61
8Eps Peg
2.1000
3900.0
91
52800
No
13
GOM_TRA_1PNPDE20120403_203527_000000433113_00201_52801_6117.N1
03-APR-2012 20:35:27
Twi_and_stray
43.000
106
9Bet Crv
2.6480
5600.0
86
52801
No
14
GOM_TRA_1PNPDE20120403_205802_000000373113_00201_52801_6118.N1
03-APR-2012 20:58:02
Bright
36.500
87
64Gam UMa
2.4330
11000.
73
52801
No
15
GOM_TRA_1PNPDE20120403_213128_000000453113_00201_52801_6119.N1
03-APR-2012 21:31:28
Twi_and_stray
44.500
61
8Eps Peg
2.1000
3900.0
89
52801
No
16
GOM_TRA_1PNPDE20120403_213610_000000443113_00201_52801_6120.N1
03-APR-2012 21:36:10
Dark
44.000
154
22Bet Aqr
2.8990
5700.0
88
52801
No
17
GOM_TRA_1PNPDE20120403_221541_000000453113_00202_52802_6137.N1
03-APR-2012 22:15:41
Twi_and_stray
44.500
106
9Bet Crv
2.6480
5600.0
89
52802
No
18
GOM_TRA_1PNPDE20120403_223816_000000373113_00202_52802_6138.N1
03-APR-2012 22:38:16
Bright
37.000
87
64Gam UMa
2.4330
11000.
74
52802
No
19
GOM_TRA_1PNPDE20120403_231142_000000473113_00202_52802_6139.N1
03-APR-2012 23:11:42
Twi_and_stray
47.000
61
8Eps Peg
2.1000
3900.0
94
52802
No
20
GOM_TRA_1PNPDE20120403_231624_000000433113_00202_52802_6140.N1
03-APR-2012 23:16:24
Dark
43.000
154
22Bet Aqr
2.8990
5700.0
86
52802
No
21
GOM_TRA_1PNPDE20120403_235555_000000453113_00203_52803_6159.N1
03-APR-2012 23:55:55
Twi_and_stray
44.500
106
9Bet Crv
2.6480
5600.0
89
52803
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_1PNPDK20120403_135431_000000393113_00197_52797_3206.N1
DC map with no T dep.
GOM_TRA_1PNPDK20120403_141707_000000273113_00197_52797_3207.N1
DC map used
GOM_TRA_1PNPDK20120403_153445_000000433113_00198_52798_3228.N1
DC map used
GOM_TRA_1PNPDK20120403_155721_000000323113_00198_52798_3229.N1
DC map used
GOM_TRA_1PNPDK20120403_171459_000000433113_00199_52799_3272.N1
DC map used
GOM_TRA_1PNPDK20120403_173735_000000373113_00199_52799_3273.N1
DC map used
GOM_TRA_1PNPDK20120403_185513_000000453113_00200_52800_3303.N1
DC map used
GOM_TRA_1PNPDK20120403_191748_000000393113_00200_52800_3304.N1
DC map used
GOM_TRA_1PNPDK20120403_195114_000000463113_00200_52800_3305.N1
DC map used
GOM_TRA_1PNPDE20120403_203527_000000433113_00201_52801_6117.N1
DC map used
GOM_TRA_1PNPDE20120403_205802_000000373113_00201_52801_6118.N1
DC map used
GOM_TRA_1PNPDE20120403_213128_000000453113_00201_52801_6119.N1
DC map used
GOM_TRA_1PNPDE20120403_213610_000000443113_00201_52801_6120.N1
DC map used
GOM_TRA_1PNPDE20120403_221541_000000453113_00202_52802_6137.N1
DC map used
GOM_TRA_1PNPDE20120403_223816_000000373113_00202_52802_6138.N1
DC map used
GOM_TRA_1PNPDE20120403_231142_000000473113_00202_52802_6139.N1
DC map used
GOM_TRA_1PNPDE20120403_231624_000000433113_00202_52802_6140.N1
DC map used
GOM_TRA_1PNPDE20120403_235555_000000453113_00203_52803_6159.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:
70.0000 %
Reference spectrum computed from DB:
0.00000 %
Reference spectrum with small number of measurements:
0.00000 %
SATU data not used:
25.0000 %

 

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:
13.804
24.616
NaN
St. deviation:
0.82331
6.8146
NaN
Maximum:
14.386
36.378
NaN
Minimum:
13.222
18.762
NaN
Number of data:
2.0000
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:
0.12853
-0.29505
0.14061
-0.30624
St. deviation:
0.67612
0.78119
0.98863
1.1895
Maximum:
2.7000
2.0000
4.2000
4.0000
Minimum:
-2.2000
-3.1000
-3.6000
-5.0000
Number of data:
1900.0
1900.0
4450.0
4450.0
90Percentile:
1.0000
0.70000
1.4000
1.2000

 

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
03-APR-2012 08:53:48
CALIBRATION_DATABASE
GOM_CAL_AXVIEC20120316_091957_20120315_000000_20500101_000000
1
03-APR-2012 08:53:48
LEVEL-1B_PROC_CONFIG
GOM_PR1_AXVIEC20110513_081743_20020301_000000_20500101_000000
1
03-APR-2012 08:53:48
STAR_CATALOGUE
GOM_CAT_AXVIEC20020121_161009_20020101_000000_20200101_000000
1
03-APR-2012 08:53:48
STELLAR_SPECTRA_DATABANK
GOM_STS_AXVIEC20091111_151504_20020101_160000_20500101_000000
1
03-APR-2012 08:53:48
ECMWF_FILE
AUX_ECA_AXNECM20120403_062124_20120402_210000_20120403_090000
1
03-APR-2012 08:53:48
ECMWF_FILE
AUX_ECF_AXNECM20120403_064123_20120403_090000_20120403_210000
2
03-APR-2012 10:34:03
ECMWF_FILE
AUX_ECF_AXNECM20120403_064124_20120403_150000_20120404_030000
6
03-APR-2012 15:34:45
ECMWF_FILE
AUX_ECA_AXNECM20120403_182125_20120403_090000_20120403_210000
10
03-APR-2012 18:55:13
ECMWF_FILE
AUX_ECF_AXNECM20120403_064124_20120403_150000_20120404_030000
13
03-APR-2012 20:35:27
ECMWF_FILE
AUX_ECF_AXNECM20120403_064124_20120403_210000_20120404_090000
17
03-APR-2012 22:15:41
OPTIONAL_ECMWF_FILE
MISSING
1
03-APR-2012 08:53:48
ORBIT_DATA_FILE
AUX_FPO_AXVPDS20120402_102124_20120401_194420_20120411_201744
1
03-APR-2012 08:53:48
ORBIT_DATA_FILE
AUX_FPO_AXVPDS20120403_102123_20120402_190735_20120412_212115
3
03-APR-2012 12:14:17