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	09MAY2008 13:33:06
Data source version	GOMOS/5.00
Start time of products	01-05-2008 (01MAY2008 00:00:00)
Stop time of products	02-05-2008 (02MAY2008 00:00:00)
Store outputs in DB	Yes
Nb of level 1b prods	49
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
01-MAY-2008 01:38:06	AlpTuc	148	32250

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_1PNPDE20080501_000658_000000422068_00131_32249_3886.N1	01-MAY-2008 00:06:58	Straylight	42.000	43	Alp TrA	1.9100	4250.0	84	32249	No
2	GOM_TRA_1PNPDE20080501_000910_000000372068_00131_32249_3887.N1	01-MAY-2008 00:09:10	Straylight	37.000	134	Bet TrA	2.8100	6600.0	74	32249	No
3	GOM_TRA_1PNPDE20080501_001113_000000442068_00131_32249_3888.N1	01-MAY-2008 00:11:13	Straylight	43.500	4	Alp1Cen	-0.010000	5800.0	87	32249	No
4	GOM_TRA_1PNPDE20080501_001245_000000412068_00131_32249_3889.N1	01-MAY-2008 00:12:45	Straylight	40.500	20	Bet Cru	1.2530	30000.	81	32249	No
5	GOM_TRA_1PNPDE20080501_001438_000000392068_00131_32249_3890.N1	01-MAY-2008 00:14:38	Straylight	38.500	78	Alp Lup	2.3040	28000.	77	32249	No
6	GOM_TRA_1PNPDE20080501_001611_000000412068_00131_32249_3891.N1	01-MAY-2008 00:16:11	Straylight	40.500	81	Eta Cen	2.3560	28000.	81	32249	No
7	GOM_TRA_1PNPDE20080501_001816_000000432068_00131_32249_3892.N1	01-MAY-2008 00:18:16	Twi_and_stray	42.500	54	5The Cen	2.0550	4500.0	85	32249	No
8	GOM_TRA_1PNPDE20080501_002233_000000452068_00131_32249_3893.N1	01-MAY-2008 00:22:33	Bright	44.500	169	46Gam Hya	2.9910	4700.0	89	32249	No
9	GOM_TRA_1PNPDE20080501_002552_000000382068_00131_32249_3894.N1	01-MAY-2008 00:25:52	Bright	37.500	15	67Alp Vir	0.97600	28000.	75	32249	No
10	GOM_TRA_1PNPDE20080501_002856_000000362068_00131_32249_3895.N1	01-MAY-2008 00:28:56	Bright	35.500	121	29Gam Vir	2.7400	7200.0	71	32249	No
11	GOM_TRA_1PNPDE20080501_003215_000000352068_00131_32249_3896.N1	01-MAY-2008 00:32:15	Bright	35.000	138	47Eps Vir	2.8280	4700.0	70	32249	No
12	GOM_TRA_1PNPDE20080501_003403_000000352068_00131_32249_3897.N1	01-MAY-2008 00:34:03	Bright	35.000	62	94Bet Leo	2.1360	9700.0	70	32249	No
13	GOM_TRA_1PNPDE20080501_003959_000000342068_00131_32249_3898.N1	01-MAY-2008 00:39:59	Bright	33.500	152	12Alp2CVn	2.8900	11000.	67	32249	No
14	GOM_TRA_1PNPDE20080501_004249_000000382068_00131_32249_3899.N1	01-MAY-2008 00:42:49	Bright	37.500	174	52Psi UMa	3.0040	4400.0	75	32249	No
15	GOM_TRA_1PNPDE20080501_004433_000000372068_00131_32249_3900.N1	01-MAY-2008 00:44:33	Bright	36.500	87	64Gam UMa	2.4330	11000.	73	32249	No
16	GOM_TRA_1PNPDE20080501_004558_000000362068_00131_32249_3901.N1	01-MAY-2008 00:45:58	Bright	36.000	82	48Bet UMa	2.3650	10600.	72	32249	No
17	GOM_TRA_1PNPDE20080501_004716_000000372068_00131_32249_3902.N1	01-MAY-2008 00:47:16	Bright	37.000	36	50Alp UMa	1.8000	6300.0	74	32249	No
18	GOM_TRA_1PNPDE20080501_005444_000000352068_00131_32249_3903.N1	01-MAY-2008 00:54:44	Bright	35.000	49	1Alp UMi	1.9900	6300.0	70	32249	No
19	GOM_TRA_1PNPDE20080501_010238_000000482068_00131_32249_3904.N1	01-MAY-2008 01:02:38	Bright	48.000	110	37Del Cas	2.6780	8900.0	96	32249	No
20	GOM_TRA_1PNPDE20080501_010400_000000342068_00131_32249_3905.N1	01-MAY-2008 01:04:00	Bright	34.000	68	18Alp Cas	2.2250	4500.0	68	32249	No
21	GOM_TRA_1PNPDE20080501_012444_000000442068_00131_32249_4016.N1	01-MAY-2008 01:24:44	Dark	43.500	52	16Bet Cet	2.0370	4500.0	87	32249	No
22	GOM_TRA_1PNPDE20080501_012944_000000442068_00131_32249_4017.N1	01-MAY-2008 01:29:44	Dark	44.000	18	24Alp PsA	1.1660	9700.0	88	32249	No
23	GOM_TRA_1PNPDE20080501_013530_000000402068_00131_32249_4018.N1	01-MAY-2008 01:35:30	Dark	39.500	31	Alp Gru	1.7340	15200.	79	32249	No
24	GOM_TRA_1PNPDE20080501_014734_000000392068_00132_32250_4019.N1	01-MAY-2008 01:47:34	Straylight	38.500	43	Alp TrA	1.9100	4250.0	77	32250	No
25	GOM_TRA_1PNPDE20080501_014946_000000382068_00132_32250_4020.N1	01-MAY-2008 01:49:46	Straylight	37.500	134	Bet TrA	2.8100	6600.0	75	32250	No
26	GOM_TRA_1PNPDE20080501_015149_000000442068_00132_32250_4021.N1	01-MAY-2008 01:51:49	Straylight	44.000	4	Alp1Cen	-0.010000	5800.0	88	32250	No
27	GOM_TRA_1PNPDE20080501_015321_000000372068_00132_32250_4022.N1	01-MAY-2008 01:53:21	Straylight	37.000	20	Bet Cru	1.2530	30000.	74	32250	No
28	GOM_TRA_1PNPDE20080501_015435_000000402068_00132_32250_4023.N1	01-MAY-2008 01:54:35	Straylight	40.000	77	Eps Cen	2.3030	28000.	80	32250	No
29	GOM_TRA_1PNPDE20080501_015622_000000372068_00132_32250_4024.N1	01-MAY-2008 01:56:22	Straylight	36.500	64	Gam Cen	2.2000	10600.	73	32250	No
30	GOM_TRA_1PNPDE20080501_015852_000000432068_00132_32250_4025.N1	01-MAY-2008 01:58:52	Twi_and_stray	42.500	54	5The Cen	2.0550	4500.0	85	32250	No
31	GOM_TRA_1PNPDE20080501_020309_000000412068_00132_32250_4026.N1	01-MAY-2008 02:03:09	Bright	41.000	169	46Gam Hya	2.9910	4700.0	82	32250	No
32	GOM_TRA_1PNPDE20080501_020628_000000382068_00132_32250_4027.N1	01-MAY-2008 02:06:28	Bright	38.000	15	67Alp Vir	0.97600	28000.	76	32250	No
33	GOM_TRA_1PNPDE20080501_020933_000000492068_00132_32250_4028.N1	01-MAY-2008 02:09:33	Bright	49.000	121	29Gam Vir	2.7400	7200.0	98	32250	No
34	GOM_TRA_1PNPDE20080501_021251_000000362068_00132_32250_4029.N1	01-MAY-2008 02:12:51	Bright	35.500	138	47Eps Vir	2.8280	4700.0	71	32250	No
35	GOM_TRA_1PNPDE20080501_021440_000000362068_00132_32250_4030.N1	01-MAY-2008 02:14:40	Bright	36.000	62	94Bet Leo	2.1360	9700.0	72	32250	No
36	GOM_TRA_1PNPDE20080501_022035_000000352068_00132_32250_4031.N1	01-MAY-2008 02:20:35	Bright	35.000	152	12Alp2CVn	2.8900	11000.	70	32250	No
37	GOM_TRA_1PNPDE20080501_022325_000000352068_00132_32250_4032.N1	01-MAY-2008 02:23:25	Bright	34.500	174	52Psi UMa	3.0040	4400.0	69	32250	No
38	GOM_TRA_1PNPDE20080501_022509_000000362068_00132_32250_4033.N1	01-MAY-2008 02:25:09	Bright	36.000	87	64Gam UMa	2.4330	11000.	72	32250	No
39	GOM_TRA_1PNPDE20080501_022634_000000362068_00132_32250_4034.N1	01-MAY-2008 02:26:34	Bright	35.500	82	48Bet UMa	2.3650	10600.	71	32250	No
40	GOM_TRA_1PNPDE20080501_022752_000000362068_00132_32250_4035.N1	01-MAY-2008 02:27:52	Bright	36.000	36	50Alp UMa	1.8000	6300.0	72	32250	No
41	GOM_TRA_1PNPDE20080501_023520_000000342068_00132_32250_4036.N1	01-MAY-2008 02:35:20	Bright	34.000	49	1Alp UMi	1.9900	6300.0	68	32250	No
42	GOM_TRA_1PNPDE20080501_024314_000000342068_00132_32250_4175.N1	01-MAY-2008 02:43:14	Bright	34.000	110	37Del Cas	2.6780	8900.0	68	32250	No
43	GOM_TRA_1PNPDE20080501_024436_000000332068_00132_32250_4176.N1	01-MAY-2008 02:44:36	Bright	33.000	68	18Alp Cas	2.2250	4500.0	66	32250	No
44	GOM_TRA_1PNPDE20080501_030520_000000422068_00132_32250_4177.N1	01-MAY-2008 03:05:20	Dark	41.500	52	16Bet Cet	2.0370	4500.0	83	32250	No
45	GOM_TRA_1PNPDE20080501_031021_000000462068_00132_32250_4178.N1	01-MAY-2008 03:10:21	Dark	46.000	18	24Alp PsA	1.1660	9700.0	92	32250	No
46	GOM_TRA_1PNPDE20080501_031607_000000402068_00132_32250_4179.N1	01-MAY-2008 03:16:07	Dark	39.500	31	Alp Gru	1.7340	15200.	79	32250	No
47	GOM_TRA_1PNPDE20080501_032811_000000402068_00133_32251_4180.N1	01-MAY-2008 03:28:11	Straylight	39.500	43	Alp TrA	1.9100	4250.0	79	32251	No
48	GOM_TRA_1PNPDE20080501_033023_000000372068_00133_32251_4181.N1	01-MAY-2008 03:30:23	Straylight	37.000	134	Bet TrA	2.8100	6600.0	74	32251	No
49	GOM_TRA_1PNPDE20080501_033225_000000452068_00133_32251_4182.N1	01-MAY-2008 03:32:25	Straylight	44.500	4	Alp1Cen	-0.010000	5800.0	89	32251	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 All products used the DSA observation for the DC computation

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:	22.4490 %
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:	13.553	19.721	NaN
St. deviation:	3.9872	5.2997	NaN
Maximum:	18.739	26.765	NaN
Minimum:	9.9417	6.3703	NaN
Number of data:	6.0000	26.000	NaN

6.2 Plot for DARK limb products

6.3 Plot for BRIGHT 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:	0.028766	-1.3455	-0.062107	-1.4182
St. deviation:	0.36156	0.83768	0.82896	1.3278
Maximum:	2.0000	1.0000	5.0000	5.9000
Minimum:	-1.6000	-4.2000	-5.1000	-9.2000
Number of data:	5200.0	5200.0	21350.	21350.

7.2.2 Trend of daily SATU NEA St. deviation since 1st April 2006 (dark limb)

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

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_AXNIEC20050627_150713_20030716_120000_20100101_000000	1	01-MAY-2008 00:06:58
CALIBRATION_DATABASE	GOM_CAL_AXVIEC20080424_075418_20080422_000000_20100101_000000	1	01-MAY-2008 00:06:58
LEVEL-1B_PROC_CONFIG	GOM_PR1_AXNIEC20050627_151042_20020301_000000_20100101_000000	1	01-MAY-2008 00:06:58
STAR_CATALOGUE	GOM_CAT_AXVIEC20020121_161009_20020101_000000_20200101_000000	1	01-MAY-2008 00:06:58
STELLAR_SPECTRA_DATABANK	GOM_STS_AXNIEC20040308_103538_20020101_160000_20100101_000000	1	01-MAY-2008 00:06:58
ECMWF_FILE	AUX_ECF_AXNECM20080430_081123_20080430_210000_20080501_090000	1	01-MAY-2008 00:06:58
OPTIONAL_ECMWF_FILE	MISSING	1	01-MAY-2008 00:06:58
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20080430_220123_000057382068_00129_32247_5438.N1	1	01-MAY-2008 00:06:58
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20080430_234220_000057382068_00130_32248_5439.N1	21	01-MAY-2008 01:24:44
ORBIT_DATA_FILE	DOR_NAV_0PNPDE20080501_012317_000041442068_00131_32249_5440.N1	42	01-MAY-2008 02:43:14

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