GOMOS Daily Report 27-FEB-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
29FEB2012 07:00:29
Data source version
GOMOS/6.01
Start time of products
27FEB2012 00:36:29
Stop time of products
27FEB2012 23:59:52
Store outputs in DB
Yes
Nb of level 1b prods
18
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

!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_1PNPDE20120227_003629_000000413112_00103_52272_2680.N1
27-FEB-2012 00:36:29
Dark
41.000
10
Bet Cen
0.61000
28000.
82
52272
No
2
GOM_TRA_1PNPDE20120227_021643_000000453112_00104_52273_2704.N1
27-FEB-2012 02:16:43
Dark
44.500
10
Bet Cen
0.61000
28000.
89
52273
No
3
GOM_TRA_1PNPDE20120227_035658_000000453112_00105_52274_2758.N1
27-FEB-2012 03:56:58
Dark
44.500
10
Bet Cen
0.61000
28000.
89
52274
No
4
GOM_TRA_1PNPDE20120227_053712_000000423112_00106_52275_2801.N1
27-FEB-2012 05:37:12
Dark
41.500
10
Bet Cen
0.61000
28000.
83
52275
No
5
GOM_TRA_1PNPDK20120227_071727_000000433112_00107_52276_7215.N1
27-FEB-2012 07:17:27
Dark
43.000
10
Bet Cen
0.61000
28000.
86
52276
No
6
GOM_TRA_1PNPDK20120227_103756_000000483112_00109_52278_7268.N1
27-FEB-2012 10:37:56
Dark
47.500
10
Bet Cen
0.61000
28000.
95
52278
No
7
GOM_TRA_1PNPDK20120227_121810_000000413112_00110_52279_7294.N1
27-FEB-2012 12:18:10
Dark
40.500
10
Bet Cen
0.61000
28000.
81
52279
No
8
GOM_TRA_1PNPDK20120227_135825_000000433112_00111_52280_7325.N1
27-FEB-2012 13:58:25
Dark
43.000
10
Bet Cen
0.61000
28000.
86
52280
No
9
GOM_TRA_1PNPDK20120227_153839_000000433112_00112_52281_7337.N1
27-FEB-2012 15:38:39
Dark
43.000
10
Bet Cen
0.61000
28000.
86
52281
No
10
GOM_TRA_1PNPDK20120227_171854_000000433112_00113_52282_7388.N1
27-FEB-2012 17:18:54
Dark
43.000
10
Bet Cen
0.61000
28000.
86
52282
No
11
GOM_TRA_1PNPDK20120227_184444_000000423112_00113_52282_7428.N1
27-FEB-2012 18:44:44
Dark
42.000
38
20Eps Sgr
1.8360
11000.
84
52282
No
12
GOM_TRA_1PNPDK20120227_185909_000000433112_00114_52283_7429.N1
27-FEB-2012 18:59:09
Dark
42.500
10
Bet Cen
0.61000
28000.
85
52283
No
13
GOM_TRA_1PNPDK20120227_202458_000000473112_00114_52283_7465.N1
27-FEB-2012 20:24:58
Dark
46.500
38
20Eps Sgr
1.8360
11000.
93
52283
No
14
GOM_TRA_1PNPDK20120227_203923_000000423112_00115_52284_7466.N1
27-FEB-2012 20:39:23
Dark
41.500
10
Bet Cen
0.61000
28000.
83
52284
No
15
GOM_TRA_1PNPDE20120227_220513_000000423112_00115_52284_3013.N1
27-FEB-2012 22:05:13
Dark
42.000
38
20Eps Sgr
1.8360
11000.
84
52284
No
16
GOM_TRA_1PNPDE20120227_221938_000000453112_00116_52285_3014.N1
27-FEB-2012 22:19:38
Dark
44.500
10
Bet Cen
0.61000
28000.
89
52285
No
17
GOM_TRA_1PNPDE20120227_234527_000000453112_00116_52285_3039.N1
27-FEB-2012 23:45:27
Dark
44.500
38
20Eps Sgr
1.8360
11000.
89
52285
No
18
GOM_TRA_1PNPDE20120227_235952_000000443112_00117_52286_3040.N1
27-FEB-2012 23:59:52
Dark
43.500
10
Bet Cen
0.61000
28000.
87
52286
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_1PNPDE20120227_003629_000000413112_00103_52272_2680.N1
DC map used
GOM_TRA_1PNPDE20120227_021643_000000453112_00104_52273_2704.N1
DC map used
GOM_TRA_1PNPDE20120227_035658_000000453112_00105_52274_2758.N1
DC map used
GOM_TRA_1PNPDE20120227_053712_000000423112_00106_52275_2801.N1
DC map used
GOM_TRA_1PNPDK20120227_071727_000000433112_00107_52276_7215.N1
DC map used
GOM_TRA_1PNPDK20120227_103756_000000483112_00109_52278_7268.N1
DC map used
GOM_TRA_1PNPDK20120227_121810_000000413112_00110_52279_7294.N1
DC map used
GOM_TRA_1PNPDK20120227_135825_000000433112_00111_52280_7325.N1
DC map used
GOM_TRA_1PNPDK20120227_153839_000000433112_00112_52281_7337.N1
DC map used
GOM_TRA_1PNPDK20120227_171854_000000433112_00113_52282_7388.N1
DC map used
GOM_TRA_1PNPDK20120227_184444_000000423112_00113_52282_7428.N1
DC map used
GOM_TRA_1PNPDK20120227_185909_000000433112_00114_52283_7429.N1
DC map used
GOM_TRA_1PNPDK20120227_202458_000000473112_00114_52283_7465.N1
DC map used
GOM_TRA_1PNPDK20120227_203923_000000423112_00115_52284_7466.N1
DC map used
GOM_TRA_1PNPDE20120227_220513_000000423112_00115_52284_3013.N1
DC map used
GOM_TRA_1PNPDE20120227_221938_000000453112_00116_52285_3014.N1
DC map used
GOM_TRA_1PNPDE20120227_234527_000000453112_00116_52285_3039.N1
DC map used
GOM_TRA_1PNPDE20120227_235952_000000443112_00117_52286_3040.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:
83.3333 %
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)

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:
16.344
NaN
NaN
St. deviation:
2.3694
NaN
NaN
Maximum:
19.881
NaN
NaN
Minimum:
11.156
NaN
NaN
Number of data:
18.000
NaN
NaN

 

6.2 Plot for DARK 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:
0.11176
-0.21496
NaN
NaN
St. deviation:
0.30657
0.46739
NaN
NaN
Maximum:
8.5000
9.8000
NaN
NaN
Minimum:
-3.6000
-4.4000
NaN
NaN
Number of data:
17500.
17500.
NaN
NaN
90Percentile:
0.50000
0.40000
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
27-FEB-2012 00:36:29
CALIBRATION_DATABASE
GOM_CAL_AXVIEC20120130_103112_20120125_000000_20500101_000000
1
27-FEB-2012 00:36:29
LEVEL-1B_PROC_CONFIG
GOM_PR1_AXVIEC20110513_081743_20020301_000000_20500101_000000
1
27-FEB-2012 00:36:29
STAR_CATALOGUE
GOM_CAT_AXVIEC20020121_161009_20020101_000000_20200101_000000
1
27-FEB-2012 00:36:29
STELLAR_SPECTRA_DATABANK
GOM_STS_AXVIEC20091111_151504_20020101_160000_20500101_000000
1
27-FEB-2012 00:36:29
ECMWF_FILE
AUX_ECF_AXNECM20120226_062116_20120226_210000_20120227_090000
1
27-FEB-2012 00:36:29
ECMWF_FILE
AUX_ECF_AXNECM20120226_182116_20120227_030000_20120227_150000
3
27-FEB-2012 03:56:58
ECMWF_FILE
AUX_ECA_AXNECM20120227_062114_20120226_210000_20120227_090000
4
27-FEB-2012 05:37:12
ECMWF_FILE
AUX_ECF_AXNECM20120227_062115_20120227_090000_20120227_210000
6
27-FEB-2012 10:37:56
ECMWF_FILE
AUX_ECF_AXNECM20120227_062115_20120227_150000_20120228_030000
9
27-FEB-2012 15:38:39
ECMWF_FILE
AUX_ECA_AXNECM20120227_181245_20120227_090000_20120227_210000
11
27-FEB-2012 18:44:44
ECMWF_FILE
AUX_ECF_AXNECM20120227_062116_20120227_210000_20120228_090000
15
27-FEB-2012 22:05:13
OPTIONAL_ECMWF_FILE
MISSING
1
27-FEB-2012 00:36:29
ORBIT_DATA_FILE
AUX_FPO_AXVPDS20120224_112114_20120223_193730_20120304_201058
1
27-FEB-2012 00:36:29
ORBIT_DATA_FILE
AUX_FPO_AXVPDS20120227_113243_20120226_192730_20120307_200057
7
27-FEB-2012 12:18:10