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6.6.6 Antenna Elevation pattern
The antenna elevation pattern values are updated
several times along the azimuth direction. Each
update is time stamped with the zero Doppler time to
which the update applies. The values continue to
apply until a new update is made, and new values
are added to the Annotation Data Set (ADS)
with a new time stamp. The contents of each
update (each update is a single ADSR within the ADS) are as
follows. This ADS is not included for SLC products. The format for
the Antenna Elevation Pattern
ADSR (ASAR_Antenna_ADSR) is given below.
Note, for Wide Swath (WS) and Global Monitoring (GM)
products, there is a separate ADSR for each beam . The ADSRs are
ordered according to their time stamps. If the
time stamps of several ADSRs are identical, the
ADSRs are ordered by beam number from SS1 to SS5.
|
Table 6.42 Antenna Elevation pattern
|
Antenna Elevation patterns(s)
|
|
#
|
Description
|
Units
|
Count
|
Type
|
Size
|
|
Data Record
|
|
0
|
zero_doppler_time
Zero Doppler
azimuth time at which pattern applies |
MJD |
1 |
mjd |
12 byte(s) |
|
1
|
attach_flag
Attachment Flag
Always set to zero for
this ADSR
|
flag |
1 |
BooleanFlag |
1 byte(s) |
|
2
|
swath
Beam ID to which
pattern applies SS1 to SS5 or NS�� |
ascii |
1 |
AsciiString |
3 byte(s) |
|
3
|
elevation_pattern
Antenna
Elevation Pattern
The following fields each
contain 11 values spaced
evenly across the image
|
- |
1 |
elevation_patternStruct |
132.0 byte(s) |
|
|
a
|
slant_range_time
2 way slant
range times |
ns |
11 |
fl |
11*4 byte(s) |
|
b
|
elevation_angles
Corresponding
elevation angles |
degrees |
11 |
fl |
11*4 byte(s) |
|
c
|
antenna_pattern
Corresponding
two-way antenna
elevation
pattern values |
dB |
11 |
fl |
11*4 byte(s) |
|
|
4
|
spare_1
Spare |
- |
1 |
SpareField |
14 byte(s) |
DS_NAME : Antenna Elevation patterns(s)
Format Version 114.0
|
|
|
|
| |
Keywords: ESA European
Space Agency - Agence spatiale europeenne,
observation de la terre, earth observation,
satellite remote sensing,
teledetection, geophysique, altimetrie, radar,
chimique atmospherique, geophysics, altimetry, radar,
atmospheric chemistry
|
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