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ASA_XCH_AX: ASAR External characterization data
ASA_XCA_AX: ASAR External calibration data
ASA_INS_AX: ASAR Instrument characterization
ASA_CON_AX: ASAR Processor Configuration
Browse Products
ASA_WS__BP: ASAR Wide Swath Browse Image
ASA_IM__BP: ASAR Image Mode Browse Image
ASA_GM__BP: ASAR Global Monitoring Mode Browse Image
ASA_AP__BP: ASAR Alternating Polarization Browse Image
Level 0 Products
ASA_WV__0P: ASAR Wave Mode Level 0
ASA_WS__0P: ASAR Wide Swath Mode Level 0
ASA_MS__0P: ASAR Level 0 Module Stepping Mode
ASA_IM__0P: ASAR Image Mode Level 0
ASA_GM__0P: ASAR Global Monitoring Mode Level 0
ASA_EC__0P: ASAR Level 0 External Characterization
ASA_APV_0P: ASAR Alternating Polarization Level 0 (Cross polar V)
ASA_APH_0P: ASAR Alternating Polarization Level 0 (Cross polar H)
ASA_APC_0P: ASAR Alternating Polarization Level 0 (Copolar)
Level 1 Products
ASA_IMS_1P: ASAR Image Mode Single Look Complex
ASA_IMP_1P: ASAR Image Mode Precision Image
ASA_IMM_1P: ASAR Image Mode Medium Resolution Image
ASA_IMG_1P: ASAR Image Mode Ellipsoid Geocoded Image
ASA_GM1_1P: ASAR Global Monitoring Mode Image
ASA_APS_1P: ASAR Alternating Polarization Mode Single Look Complex
ASA_APP_1P: ASAR Alternating Polarization Mode Precision Image
ASA_APM_1P: ASAR Alternating Polarization Medium Resolution Image product
ASA_WSS_1P: Wide Swath Mode SLC Image
ASA_WVS_1P: ASAR Wave Mode Imagette Cross Spectra
ASA_WSM_1P: ASAR Wide Swath Medium Resolution Image
ASA_APG_1P: ASAR Alternating Polarization Ellipsoid Geocoded Image
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ASA_WVW_2P: ASAR Wave Mode Wave Spectra
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6.6.4 ASAR external calibration data

The external calibration scaling factor is determined by ESA using three calibrated transponders, and the in-flight elevation pattern estimates are obtained using natural targets with known properties, such as the rainforest. This information is captured in the External Calibration Data file.

SIZE: MPH(1247 bytes) + SPH (378 bytes) + GADS (26552 bytes).

The MPH and SPH of these files will follow the standard MPH, SPH structure of all ENVISAT-1 auxiliary data . There is one DSD in the SPH, known as the ASA_XCA_AX_GADS, and the format for this record is given below.

Note that information is provided for all 5 of the ASAR product modes, which are the Image (IM) mode , Alternating Polarisation (AP) mode , Wide Swath (WS) mode , Global Monitoring (GM) mode , and the Wave (WV) mode , and for all swaths IS1 to IS7 as well as the sub-swaths SS1 to SS5.


Table 6.40 ASAR external calibration data

Contains ASAR external calibration data

# Description Units Count Type Size
Data Record
0 dsr_time
Time of creation of this file
MJD 1 mjd 12 byte(s)
1 dsr_length
DSR Length

Length of this DSR in bytes

bytes 1 ul 4 byte(s)
2 ext_cal_im_hh
External Calibration scaling factors for IM mode, SLC image, HH polar. (7 values from swath IS1 to IS7)
- 7 fl 7*4 byte(s)
3 ext_cal_im_vv
External Calibration scaling factors for IM mode, SLC image, VV polar. (7 values from swath IS1 to IS7)
- 7 fl 7*4 byte(s)
4 ext_cal_im_pri_hh
External Calibration scaling factors for IM mode, Precision Image, HH polar. (7 values from swath IS1 to IS7)
- 7 fl 7*4 byte(s)
5 ext_cal_im_pri_vv
External Calibration scaling factors for IM mode, Precision Image, VV polar. (7 values from swath IS1 to IS7)
- 7 fl 7*4 byte(s)
6 ext_cal_im_geo_hh
External Calibration scaling factors for IM mode, Geocoded Image, HH polar. (7 values from swath IS1 to IS7)
- 7 fl 7*4 byte(s)
7 ext_cal_im_geo_vv
External Calibration scaling factors for IM mode, Geocoded Image, VV polar. (7 values from swath IS1 to IS7)
- 7 fl 7*4 byte(s)
8 ext_cal_im_med_hh
External Calibration scaling factors for IM mode, Medium Resolution Image, HH polarisation

(7 values from swath IS1 to IS7)

- 7 fl 7*4 byte(s)
9 ext_cal_im_med_vv
External Calibration scaling factors for IM mode, Medium Resolution Image, VV polarisation

(7 values from swath IS1 to IS7)

- 7 fl 7*4 byte(s)
10 ext_cal_ap_hh
External Calibration scaling factors for AP mode, SLC image, HH polar. (7 values from swath IS1 to IS7)
- 7 fl 7*4 byte(s)
11 ext_cal_ap_vv
External Calibration scaling factors for AP mode, SLC image, VV polar. (7 values from swath IS1 to IS7)
- 7 fl 7*4 byte(s)
12 ext_cal_ap_hv
External Calibration scaling factors for AP mode, SLC image, HV polar. (7 values from swath IS1 to IS7)
- 7 fl 7*4 byte(s)
13 ext_cal_ap_vh
External Calibration scaling factors for AP mode, SLC image, VH polar. (7 values from swath IS1 to IS7)
- 7 fl 7*4 byte(s)
14 ext_cal_ap_pri_hh
External Calibration scaling factors for AP mode, Precision Image, HH polar. (7 values from swath IS1 to IS7)
- 7 fl 7*4 byte(s)
15 ext_cal_ap_pri_vv
External Calibration scaling factors for AP mode, Precision Image, VV polar. (7 values from swath IS1 to IS7)
- 7 fl 7*4 byte(s)
16 ext_cal_ap_pri_hv
External Calibration scaling factors for AP mode, Precision Image, HV polar. (7 values from swath IS1 to IS7)
- 7 fl 7*4 byte(s)
17 ext_cal_ap_pri_vh
External Calibration scaling factors for AP mode, Precision Image, VH polar. (7 values from swath IS1 to IS7)
- 7 fl 7*4 byte(s)
18 ext_cal_ap_geo_hh
External Calibration scaling factors for AP mode, Geocoded Image, HH polar. (7 values from swath IS1 to IS7)
- 7 fl 7*4 byte(s)
19 ext_cal_ap_geo_vv
External Calibration scaling factors for AP mode, Geocoded Image, VV polar. (7 values from swath IS1 to IS7)
- 7 fl 7*4 byte(s)
20 ext_cal_ap_geo_hv
External Calibration scaling factors for AP mode, Geocoded Image, HV polarisation

(7 values from swath IS1 to IS7)

- 7 fl 7*4 byte(s)
21 ext_cal_ap_geo_vh
External Calibration scaling factors for AP mode, Geocoded Image, VH polar. (7 values from swath IS1 to IS7)
- 7 fl 7*4 byte(s)
22 ext_cal_ap_med_hh
External Calibration scaling factors for AP mode, Medium Resolution Image, HH polarisation

(7 values from swath IS1 to IS7)

- 7 fl 7*4 byte(s)
23 ext_cal_ap_med_vv
External Calibration scaling factors for AP mode, Medium Resolution Image, VV polarisation

(7 values from swath IS1 to IS7)

- 7 fl 7*4 byte(s)
24 ext_cal_ap_med_hv
External Calibration scaling factors for AP mode, Medium Resolution Image, HV polarisation

(7 values from swath IS1 to IS7)

- 7 fl 7*4 byte(s)
25 ext_cal_ap_med_vh
External Calibration scaling factors for AP mode, Medium Resolution Image, VH polarisation

(7 values from swath IS1 to IS7)

- 7 fl 7*4 byte(s)
26 ext_cal_wv_hh
External Calibration scaling factors for WV mode, HH polarisation

(7 values from swath IS1 to IS7)

- 7 fl 7*4 byte(s)
27 ext_cal_wv_vv
External Calibration scaling factors for WV mode, VV polar. (7 values from swath IS1 to IS7)
- 7 fl 7*4 byte(s)
28 ext_cal_ws_hh
External Calibration scaling factors for WS mode, detected image 111HH polar.
- 1 fl 4 byte(s)
29 ext_cal_ws_vv
External Calibration scaling factors for WS mode, detected image ,VV polar.
- 1 fl 4 byte(s)
30 ext_cal_gm_hh
External Calibration scaling factors for GM mode, HH polar.
- 1 fl 4 byte(s)
31 ext_cal_gm_vv
External Calibration scaling factors for GM mode, VV polar.
- 1 fl 4 byte(s)
32 elev_ang_is1
Reference elevation angle for IS1
deg. 1 fl 4 byte(s)
33 elev_ang_is2
Reference elevation angle for IS2
deg. 1 fl 4 byte(s)
34 elev_ang_is3_ss2
Reference elevation angle for IS3 / SS2
deg. 1 fl 4 byte(s)
35 elev_ang_is4_ss3
Reference elevation angle for IS4 / SS3
deg. 1 fl 4 byte(s)
36 elev_ang_is5_ss4
Reference elevation angle for IS5 / SS4
deg. 1 fl 4 byte(s)
37 elev_ang_is6_ss5
Reference elevation angle for IS6 / SS5
deg. 1 fl 4 byte(s)
38 elev_ang_is7
Reference elevation angle for IS7
deg. 1 fl 4 byte(s)
39 elev_ang_ss1
Reference elevation angle for SS1
deg. 1 fl 4 byte(s)
40 pattern_is1
Two-way Antenna Elevation Pattern Gain Table for IS1. Four tables, 1 for each HH, VV, HV, VH polarisation. The pattern is defined from reference elevation angle - 5 deg. to reference elevation angle + 5 deg. in 0.05 degree steps.
dB 4*201 fl 4*201*4 byte(s)
41 pattern_is2
Two-way Antenna Elevation Pattern Gain Table for IS2. Four tables, 1 for each HH, VV, HV, VH polarisation. The pattern is defined from reference elevation angle - 5 deg. to reference elevation angle + 5 deg. in 0.05 degree steps.
dB 4*201 fl 4*201*4 byte(s)
42 pattern_is3_ss2
Two-way Antenna Elevation Pattern Gain Table for IS3/SS2. Four tables, 1 for each HH, VV, HV, VH polarisation. The pattern is defined from reference elevation angle - 5 deg. to reference elevation angle + 5 deg. in 0.05 degree steps.
dB 4*201 fl 4*201*4 byte(s)
43 pattern_is4_ss3
Two-way Antenna Elevation Pattern Gain Table for IS4/SS3. Four tables, 1 for each HH, VV, HV, VH polarisation. The pattern is defined from reference elevation angle - 5 deg. to reference elevation angle + 5 deg. in 0.05 degree steps.
dB 4*201 fl 4*201*4 byte(s)
44 pattern_is5_ss4
Two-way Antenna Elevation Pattern Gain Table for IS5/SS4. Four tables, 1 for each HH, VV, HV, VH polarisation. The pattern is defined from reference elevation angle - 5 deg. to reference elevation angle + 5 deg. in 0.05 degree steps.
dB 4*201 fl 4*201*4 byte(s)
45 pattern_is6_ss5
Two-way Antenna Elevation Pattern Gain Table for IS6/SS5. Four tables, 1 for each HH, VV, HV, VH polarisation. The pattern is defined from reference elevation angle - 5 deg. to reference elevation angle + 5 deg. in 0.05 degree steps.
dB 4*201 fl 4*201*4 byte(s)
46 pattern_is7
Two-way Antenna Elevation Pattern Gain Table for IS7. Four tables, 1 for each HH, VV, HV, VH polarisation. The pattern is defined from reference elevation angle - 5 deg. to reference elevation angle + 5 deg. in 0.05 degree steps.
dB 4*201 fl 4*201*4 byte(s)
47 pattern_ss1
Two-way Antenna Elevation Pattern Gain Table for SS1. Four tables, 1 for each HH, VV, HV, VH polarisation. The pattern is defined from reference elevation angle - 5 deg. to reference elevation angle + 5 deg. in 0.05 degree steps.
dB 4*201 fl 4*201*4 byte(s)
48 ext_cal_ws_slc_hh
External Calibration scaling factors for WS mode, SLC Image HH polar.
- 1 fl 4 byte(s)
49 ext_cal_ws_slc_vv
External Calibration scaling factors for WS mode, SLC Image VV polar
- 1 fl 4 byte(s)
50 spare_1
Spare
- 1 SpareField 24 byte(s)
Record Length : 26552

DS_NAME : Contains ASAR external calibration data



Format Version 114.0