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PAZ Full Archive and New Tasking

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blue arrow DESCRIPTION

PAZ Image Products can be acquired in 8 image modes with flexible resolutions (from 1 m to 40 m) and scene sizes. Thanks to different polarimetric combinations and processing levels the delivered imagery can be tailored specifically to meet the requirements of the application.

Available modes are:

  • StripMap mode (SM): The ground swath is illuminated with a continuous train of pulses while the antenna beam is pointed to a fixed angle, both in elevation and in azimuth.
  • ScanSAR mode (SC): the swath width is increased respecting to the StripMap mode, it is composed of four different sub-swaths, which are obtained by antenna steering in elevation direction
  • Spotlight modes: Spotlight modes take advantage of the beam steering capability in the azimuth plane to illuminate for a longer time the area of interest: a sensible improvement of the azimuth resolution is achieved at the expense of a shorter scene size. Spotlight mode (SL) is designed to maximise the azimuth scene extension at the expense of the spatial resolution, and High Resolution Spotlight mode (HS) is designed to maximize the spatial resolutions at the expense of the scene extension.

There are two main classes of products:

  • Spatially Enhanced products (SE): designed with the target of maximize the spatial resolution in pixels with squared size, so the larger resolution value of azimuth or ground range determines the square pixel size, and the smaller resolution value is adjusted to this size and the corresponding reduction of the bandwidth is used for speckle reduction.
  • Radiometrically Enhanced products (RE): designed with the target of maximize the radiometry, so the range and azimuth resolutions are intentionally decreased to significantly reduce speckle by averaging several looks.

The following geometric projections are offered:

  • Single Look Slant Range Complex (SSC): single look product of the focused radar signal: the pixels are spaced equidistant in azimuth and in slant range. No geocoding is available, no radiometric artifacts included. Product delivered in the DLR-defined binary COSAR format. The SSC product is intended for applications that require the full bandwidth and phase information, e.g. for SAR interferometry and polarimetry.
  • Multi Look Ground Range Detected (MGD): detected multi look product in GeoTiff format with reduced speckle and approximately square resolution cells on ground. The image coordinates are oriented along flight direction and along ground range; the pixel spacing is equidistant in azimuth and in ground range. A simple polynomial slant to ground projection is performed in range using a WGS84 ellipsoid and an average, constant terrain height parameter. No image rotation to a map coordinate system is performed and interpolation artifacts are thus avoided.
  • Geocoded Ellipsoid Corrected (GEC): multi look detected product in GeoTiff format. It is projected and re-sampled to the WGS84 reference ellipsoid assuming one average terrain height. No terrain correction performed. UTM is the standard projection, for polar regions UPS is applied.
  • Enhanced Ellipsoid Corrected (EEC): multi look detected product in GeoTiff format. It is projected and re-sampled to the WGS84 reference ellipsoid. The image distortions caused by varying terrain height are corrected using an external DEM; therefore the pixel localization in these products is highly accurate. UTM is the standard projection, for polar regions UPS is applied.
  StripMap Single StripMap Dual ScanSAR Spotlight Single Spotlight Dual HR Spotlight
Single
HR Spotlight
Dual
Mode ID SM-S SM-D SC SL-S SL-D HS-S HS-D
Polarizations HH, VV HH/VV, HH/HV,
VV/VH
HH, VV HH, VV HH/VV HH, VV HH, VV
Scene size (Range x Azimuth) [km] 50 x 30 15 x 50 100 x 150 10 x 10 10 x 10 10/6 x 5 10 x 5
Range Resolution [m] MGD, GEC, EEC (SE) 2.99 - 3.52
at (45° - 20°)
6 N/A 1.55 - 3.43
at (55° - 20°)
3.09 - 3.5
at (55° - 20°)
1 - 1.76
at (55° - 20°)
2 - 3.5
at (55° - 20°)
MGD, GEC, EEC (RE)
(RE)
6.53 - 7.65
at (45° - 20°)
7.51 - 10.43
at (45° - 20°)
16.79 - 18.19
at (45° - 20°)
3.51 - 5.43
at (55° - 20°)
4.98 - 7.63
at (55° - 20°)
2.83 - 3.11
at (55° - 20°)
4 - 6.2
at (55° - 20°)
SSC 1.1 1.18 N/A 1.18 1.17 0.6 1.17
Azimuth Resolution [m] MGD, GEC, EEC (SE) 3.05 6.11 N/A 1.56 - 2.9
at (55° - 20°)
3.53 1 - 1.49
at (55 °- 20°)
2.38 - 2.93
at (55° - 20°)
MGD, GEC, EEC (RE)
(RE)
6.53 - 7.60
at (45° - 20°)
7.52 - 10.4
at (45° - 20°)
17.66 - 18.18
at (45° - 20°)
3.51 - 5.4
at (55° - 20°)
4.99 - 7.64
at (55° - 20°)
2.83 - 3.13
at (55° - 20°)
4 - 6.25
at (55° - 20°)
SSC 3.01 6.04 N/A 1.46 3.01 1.05 2.16

blue arrow DETAILS

blue arrow DATA SET SPECIFICATIONS

Spatial coverage: 

90 N, -90 S, -180 W, 180 E

Temporal coverage:

2018-09-06 - present

Mission status:
Ongoing
Orbit height:
514 km
Orbit type:
Sun-synchronous
Swath width:
10x10 km Spotlight, 10X5 km HR Spotlight, 100x150 km ScanSAR, 15/30 x50 km StripMap
Resolution:

Very High Resolution - VHR (0 - 5 m)

High Resolution - HR (5 - 20 m)

Wavelengths: X-Band (2.8 - 5.2 cm)

blue arrow PROCESSING LEVEL

Level 1b,

blue arrow HOW TO ACCESS THIS DATA

Data are available for scientific research and application development after submission and acceptance of Project Proposal. Worldwide access with data owner validation.

blue arrow APPLICABLE TERMS & CONDITIONS

Utilisation of this data is subject to ESA's Earth Observation Terms and Conditions

READ T&C

blue arrow RESOURCES

PAZ Image Product Guide
Technical Note
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