ANSI-C program: S1_burstloc.c
NAME
S1_burstloc - extract burst location and time information given in the Sentinel-1 annotation
SYNOPSIS
S1_burstloc <annotation_XML>
| <annotation_XML> | (input) Sentinel-1 L1 XML annotation file |
EXAMPLE
S1_burstloc s1a-iw1-slc-vv-20200128t224414-20200128t224440-031007-038fbf-004.xml
DESCRIPTION
S1_burstloc reads the burst location information from the Sentinel-1 annotation file of a given swath and
polarization. The program then prints out a table of the start time of each burst and the geographic latitude and
longitude of each corner. Each S1 SLC data product has a set of annotation XML files located in the annotation
product directory. There are individual annotation files for each swath and polarization. For an image acquired
over Montreal, Canada, these are the XML files contained in the annotation directory:
s1a-iw2-slc-vv-20200128t224415-20200128t224440-031007-038fbf-005.xml
s1a-iw1-slc-vh-20200128t224414-20200128t224440-031007-038fbf-001.xml
s1a-iw3-slc-vh-20200128t224414-20200128t224439-031007-038fbf-003.xml
s1a-iw1-slc-vv-20200128t224414-20200128t224440-031007-038fbf-004.xml
s1a-iw3-slc-vv-20200128t224414-20200128t224439-031007-038fbf-006.xml
s1a-iw2-slc-vh-20200128t224415-20200128t224440-031007-038fbf-002.xml
Note that the XML file name includes the swath (iw1, iw2, iw3) and the polarization (vv, vh).
An example of the output of S1_burstloc for the first swath (iw1) and VV polarization (vv):
S1_burstloc
s1a-iw1-slc-vv-20200128t224414-20200128t224440-031007-038fbf-004.xml
*** Print Burst information found in the Sentinel-1 annotation file ***
*** Copyright 2018, Gamma Remote Sensing, v1.2 4-Sep-2018 awi/cm ***
S1 XML annotation: s1a-iw1-slc-vv-20200128t224414-20200128t224440-031007-038fbf-004.xml
Burst: s1a-iw1-slc-vv-20200128t224414-20200128t224440-031007-038fbf-004.xml 1
135 IW1 VV 81856.42758411 45.04650886 0.00000000 44.97667280
-74.28317919 45.15654784 -74.33336168 45.29936492
-73.25512804 45.11940728 -73.20846578
Burst: s1a-iw1-slc-vv-20200128t224414-20200128t224440-031007-038fbf-004.xml 2
135 IW1 VV 81859.19025211 45.21446346 0.16795460 45.14225699
-74.32936761 45.32211753 -74.37972641 45.46501279
-73.29822358 45.28506743 -73.25141484
Burst: s1a-iw1-slc-vv-20200128t224414-20200128t224440-031007-038fbf-004.xml 3
135 IW1 VV 81861.94880811 45.38215805 0.16769459 45.30770460
-74.37568368 45.48742738 -74.42618611 45.63040277
-73.34139128 45.45059297 -73.29446655
Burst: s1a-iw1-slc-vv-20200128t224414-20200128t224440-031007-038fbf-004.xml 4
135 IW1 VV 81864.70736511 45.54984270 0.16768465 45.47361598
-74.41680976 45.65332473 -74.46747461 45.79623635
-73.38008876 45.61643871 -73.33302942
Burst: s1a-iw1-slc-vv-20200128t224414-20200128t224440-031007-038fbf-004.xml 5
135 IW1 VV 81867.46386611 45.71739240 0.16754971 45.63879096
-74.46336964 45.81860815 -74.51425153 45.96160374
-73.42351988 45.78169530 -73.37627663
Burst: s1a-iw1-slc-vv-20200128t224414-20200128t224440-031007-038fbf-004.xml 6
135 IW1 VV 81870.22242211 45.88505707 0.16766467 45.80407555
-74.51013172 45.98400105 -74.56123326 46.12708280
-73.46712478 45.94706367 -73.41969540
Burst: s1a-iw1-slc-vv-20200128t224414-20200128t224440-031007-038fbf-004.xml 7
135 IW1 VV 81872.98097911 46.05271188 0.16765481 45.96934656
-74.55706341 46.14913397 -74.60831677 46.29230393
-73.51080770 46.11242059 -73.46325530
Burst: s1a-iw1-slc-vv-20200128t224414-20200128t224440-031007-038fbf-004.xml 8
135 IW1 VV 81875.73748011 46.22023185 0.16751997 46.13448068
-74.60413160 46.31437620 -74.65560925 46.45763662
-73.55466799 46.27764272 -73.50692547
Burst: s1a-iw1-slc-vv-20200128t224414-20200128t224440-031007-038fbf-004.xml 9
135 IW1 VV 81878.49603611 46.38786684 0.16763499 46.29972410
-74.65140856 46.47948137 -74.70304237 46.62283439
-73.59864210 46.44297641 -73.55077283
The different fields of the each line include the XML filename, burst number, track number, swath, polarization,
start time of the burst, the sum of the argument of periapsis (perigee) + true anomaly, the change in true anomaly
relative to the previous burst, and 4 coordinate pairs in latitude and longitude of the burst corners. See
the Wikipedia for an explanation of orbital elements: https://en.wikipedia.org/wiki/Orbital_elements.