6.6.10 Measurement Data Set 1
The Measurement Data Set (MDS)
consists of several Measurement Data Set Records
(MDSRs) and each MDSR contains the processed SAR data for one range line. The number of
MDSRs within a given product depends on the
number of range lines contained within the
data set. The length of each MDSR depends on the
product, the swath , and the data format
used to represent the samples.
Each MDSR consists of a small header, followed by
the processed SAR data. Note that for the geocoded products there is no
correlation between the MDSR and zero Doppler time , so the
time entry is set to zero. Zero Doppler times in
the Annotation Data Sets
(ADSs) of the geocoded product refer to
those of the intermediate image created before
geocoding. For detected images the SAR
data consists of real valued samples.
|
Table 6.46 Measurement Data Set 1
|
|
#
|
Description
|
Units
|
Count
|
Type
|
Size
|
|
Data Record
|
|
0
|
zero_doppler_time
Zero Doppler
Time in azimuth
MJD format
|
MJD |
1 |
mjd |
12 byte(s) |
|
1
|
quality_flag
Quality
Indicator Set to
-1 if all entries in MDSR
are zero, set to zero otherwise
|
flag |
1 |
BooleanFlag |
1 byte(s) |
|
2
|
line_num
Range line
number. Numbered
sequentially, for each
product (or slice) first
range line in MDS is 1.
Warning: (1) For a stripline
product, which may
consist of multiple slices
in a single MDS, this number
is reset to 1 at the
beginning of each slice. (2)
For child products, which
are subsets of a full
product, the range line
number in the first record
may not be 1
|
- |
1 |
ul |
4 byte(s) |
|
3
|
proc_data
SAR Processed
Data. Real samples
(detected products)
|
- |
|
- |
0 byte(s) |
DS_NAME : Measurement Data Set 5
Format Version 114.0
|
EO Data Access
