SAFE—Sentinel-1安全XML产品

司机简称

SAFE

Driver built-in by default

This driver is built-in by default

哨兵产品驱动程序。目前只支持Sentinel-1sar产品。另请参见 GDAL Sentinel-2 driver

SENTINEL数据产品使用欧洲标准存档格式（SAFE）格式规范的SENTINEL特定变体进行分发。安全格式被设计成在欧空局地球观测存档设施内存档和传输数据的通用格式。

如果选择manifest.SAFE或包含目录，则将使用SAFE驱动程序，它可以将所有图像视为一个一致的数据集。

SAFE驱动程序还从元数据中读取地理位置网格点，并将它们表示为数据集上的gcp。

欧空局将以这种格式分发其他卫星数据集；不过，目前这一驱动程序只支持特定的Sentinel-1合成孔径雷达产品。所有其他的都将被忽略，或者导致各种运行时错误。

驱动程序功能

Supports Georeferencing

This driver supports georeferencing

Supports VirtualIO

This driver supports virtual I/O operations (/vsimem/, etc.)

多重测量

如果产品包含多个测量值（例如多个偏振），则每个测量值都可用作栅格带（如果样本相同）。当条带相同时，地理区域也相同。

如果产品包含多条线束和多个极化，默认情况下驱动程序将显示第一条线束。要访问其他线束，用户必须选择特定的子数据集。

The syntax of subdataset naming and their content has been significantly change in GDAL 3.4.

实例

打开Sentinel-1产品：

$ gdalinfo S1A_IW_GRDH_1SDV_20150705T064241_20150705T064306_006672_008EA0_24EE.SAFE/manifest.safe

Driver: SAFE/Sentinel-1 SAR SAFE Product
Files: S1A_IW_GRDH_1SDV_20150705T064241_20150705T064306_006672_008EA0_24EE.SAFE/manifest.safe
       S1A_IW_GRDH_1SDV_20150705T064241_20150705T064306_006672_008EA0_24EE.SAFE/measurement/s1a-iw-grd-vh-20150705t064241-20150705t064306-006672-008ea0-002.tiff
       S1A_IW_GRDH_1SDV_20150705T064241_20150705T064306_006672_008EA0_24EE.SAFE/measurement/s1a-iw-grd-vv-20150705t064241-20150705t064306-006672-008ea0-001.tiff
Size is 256, 167
Coordinate System is `'
GCP Projection =
GEOGCS["WGS 84",
    DATUM["WGS_1984",
        SPHEROID["WGS 84",6378137,298.257223563,
            AUTHORITY["EPSG","7030"]],
        AUTHORITY["EPSG","6326"]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4326"]]
GCP[  0]: Id=1, Info=
          (0,0) -> (-8.03500070209827,39.6332161725022,141.853266630322)
Metadata:
  ACQUISITION_START_TIME=2015-07-05T06:42:41.504840
  ACQUISITION_STOP_TIME=2015-07-05T06:43:06.503530
  BEAM_MODE=IW
  BEAM_SWATH=IW
  FACILITY_IDENTIFIER=UPA_
  LINE_SPACING=1.000655e+01
  MISSION_ID=S1A
  MODE=IW
  ORBIT_DIRECTION=DESCENDING
  ORBIT_NUMBER=6672
  PIXEL_SPACING=1.000000e+01
  PRODUCT_TYPE=GRD
  SATELLITE_IDENTIFIER=SENTINEL-1
  SENSOR_IDENTIFIER=SAR
  SWATH=IW
Subdatasets:
  SUBDATASET_1_NAME=SENTINEL1_DS:S1A_IW_GRDH_1SDV_20150705T064241_20150705T064306_006672_008EA0_24EE.SAFE:IW_VH
  SUBDATASET_1_DESC=Single band with IW swath and VH polarization
  SUBDATASET_2_NAME=SENTINEL1_DS:S1A_IW_GRDH_1SDV_20150705T064241_20150705T064306_006672_008EA0_24EE.SAFE:IW_VV
  SUBDATASET_2_DESC=Single band with IW swath and VV polarization
  SUBDATASET_3_NAME=SENTINEL1_DS:S1A_IW_GRDH_1SDV_20150705T064241_20150705T064306_006672_008EA0_24EE.SAFE:IW
  SUBDATASET_3_DESC=IW swath with all polarizations as bands
Corner Coordinates:
Upper Left  (    0.0,    0.0)
Lower Left  (    0.0,  167.0)
Upper Right (  256.0,    0.0)
Lower Right (  256.0,  167.0)
Center      (  128.0,   83.5)
Band 1 Block=256x16 Type=UInt16, ColorInterp=Undefined
  Metadata:
    POLARISATION=VH
    SWATH=IW
Band 2 Block=256x16 Type=UInt16, ColorInterp=Undefined
  Metadata:
    POLARISATION=VV
    SWATH=IW

不必打开manifest.safe，只需传递文件夹名称：

$ gdalinfo S1A_IW_GRDH_1SDV_20150705T064241_20150705T064306_006672_008EA0_24EE.SAFE

打开单个测量（例如IW/VH）：

$ gdalinfo SENTINEL1_DS:S1A_IW_GRDH_1SDV_20150705T064241_20150705T064306_006672_008EA0_24EE.SAFE:IW_VV

or starting with GDAL 3.4

$ gdalinfo SENTINEL1_CALIB:UNCALIB:test.SAFE:IW_VV:AMPLITUDE

数据校准

Starting with GDAL 3.4, calibration is applied for SIGMA0, BETA0 and GAMMA calibration subdataset

SAFE—Sentinel-1安全XML产品

驱动程序功能

多重测量

实例

数据校准

也见