|
|
GOMOS Daily Report 19-MAR-2012
GOMOS Daily Report 19-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
|
21MAR2012 07:00:38
|
Data source version
|
GOMOS/6.01
|
Start time of products
|
19MAR2012 01:14:11
|
Stop time of products
|
19MAR2012 07:55:09
|
Store outputs in DB
|
Yes
|
Nb of level 1b prods
|
5
|
Nb of prods with errors
|
0
|
2. Summary of products arrived in PCF (Product Control Facility)
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).
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 DARK limb contitions found
!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_1PNPDE20120319_011411_000000423112_00405_52574_0640.N1
|
19-MAR-2012 01:14:11
|
Straylight
|
42.000
|
64
|
Gam Cen
|
2.2000
|
10600.
|
84
|
52574
|
No
|
2
|
GOM_TRA_1PNPDE20120319_025426_000000433112_00406_52575_0663.N1
|
19-MAR-2012 02:54:26
|
Straylight
|
43.000
|
64
|
Gam Cen
|
2.2000
|
10600.
|
86
|
52575
|
No
|
3
|
GOM_TRA_1PNPDE20120319_043440_000000403112_00407_52576_0717.N1
|
19-MAR-2012 04:34:40
|
Straylight
|
39.500
|
64
|
Gam Cen
|
2.2000
|
10600.
|
79
|
52576
|
No
|
4
|
GOM_TRA_1PNPDE20120319_061454_000000433112_00408_52577_0765.N1
|
19-MAR-2012 06:14:54
|
Straylight
|
42.500
|
64
|
Gam Cen
|
2.2000
|
10600.
|
85
|
52577
|
No
|
5
|
GOM_TRA_1PNPDK20120319_075509_000000443112_00409_52578_6596.N1
|
19-MAR-2012 07:55:09
|
Straylight
|
44.000
|
64
|
Gam Cen
|
2.2000
|
10600.
|
88
|
52578
|
No
|
3. Plot of GOMOS spectrometers
and photometers temperatures from level 1b data
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.
|
Product name
|
DC information
|
GOM_TRA_1PNPDE20120319_011411_000000423112_00405_52574_0640.N1
|
DC map used
|
GOM_TRA_1PNPDE20120319_025426_000000433112_00406_52575_0663.N1
|
DC map used
|
GOM_TRA_1PNPDE20120319_043440_000000403112_00407_52576_0717.N1
|
DC map used
|
GOM_TRA_1PNPDE20120319_061454_000000433112_00408_52577_0765.N1
|
DC map used
|
GOM_TRA_1PNPDK20120319_075509_000000443112_00409_52578_6596.N1
|
DC map used
|
No products without errors in DARK limb contitions found. No plot performed.
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.
|
|
|
At least one measurement with demodulation flag set:
|
80.0000 %
|
Reference spectrum computed from DB:
|
0.00000 %
|
Reference spectrum with small number of measurements:
|
0.00000 %
|
SATU data not used:
|
0.00000 %
|
6. Statistics and plot of tangent altitude of the last measurement (DARK & BRIGHT
products without errors)
|
Statistics
|
DARK
|
BRIGHT
|
TWILIGHT
|
Mean:
|
NaN
|
NaN
|
NaN
|
St. deviation:
|
NaN
|
NaN
|
NaN
|
Maximum:
|
NaN
|
NaN
|
NaN
|
Minimum:
|
NaN
|
NaN
|
NaN
|
Number of data:
|
NaN
|
NaN
|
NaN
|
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.
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:
|
NaN
|
NaN
|
NaN
|
NaN
|
St. deviation:
|
NaN
|
NaN
|
NaN
|
NaN
|
Maximum:
|
NaN
|
NaN
|
NaN
|
NaN
|
Minimum:
|
NaN
|
NaN
|
NaN
|
NaN
|
Number of data:
|
NaN
|
NaN
|
NaN
|
NaN
|
90Percentile:
|
NaN
|
NaN
|
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
Lower curve: 90th percentile of SATU Y axis
Upper curve: 90th percentile of SATU X axis
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
|
19-MAR-2012 01:14:11
|
CALIBRATION_DATABASE
|
GOM_CAL_AXVIEC20120316_091957_20120315_000000_20500101_000000
|
1
|
19-MAR-2012 01:14:11
|
LEVEL-1B_PROC_CONFIG
|
GOM_PR1_AXVIEC20110513_081743_20020301_000000_20500101_000000
|
1
|
19-MAR-2012 01:14:11
|
STAR_CATALOGUE
|
GOM_CAT_AXVIEC20020121_161009_20020101_000000_20200101_000000
|
1
|
19-MAR-2012 01:14:11
|
STELLAR_SPECTRA_DATABANK
|
GOM_STS_AXVIEC20091111_151504_20020101_160000_20500101_000000
|
1
|
19-MAR-2012 01:14:11
|
ECMWF_FILE
|
AUX_ECF_AXNECM20120318_064114_20120318_210000_20120319_090000
|
1
|
19-MAR-2012 01:14:11
|
ECMWF_FILE
|
AUX_ECF_AXNECM20120318_182115_20120319_030000_20120319_150000
|
3
|
19-MAR-2012 04:34:40
|
ECMWF_FILE
|
AUX_ECA_AXNECM20120319_062116_20120318_210000_20120319_090000
|
4
|
19-MAR-2012 06:14:54
|
OPTIONAL_ECMWF_FILE
|
MISSING
|
1
|
19-MAR-2012 01:14:11
|
ORBIT_DATA_FILE
|
AUX_FPO_AXVPDS20120318_232113_20120318_195739_20120328_203106
|
1
|
19-MAR-2012 01:14:11
|
|
|
