Alaska Satellite Facility
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GISMO Data Products

Test Data

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Sonde to Summit Topography

Data description
Bed data format
Bed data
Surface format
Surface data

July 08 Data set


May 23 2006 150MHz Data Products

Each flight line was segmented into approximatley 25km long sections with 20% overlap on each end. Each segment contains the following data in a zip file:

1. Thickness data 32 bit float binary, 10m pixel resolution 'seg#_thickness'
2. Thickness data GEOtiff 'seg#_thickness_geo.tif'
3. Thickness data graphic 'seg#_thickness.gif'
4. Image data 32 bit float binary, 10m pixel resolution 'seg#_image'
5. Image data GEOtiff 'seg#_image_geo.tif'
6. Image data graphic 'seg#_image.gif'
7. Header file with columns, rows, projection information, and corner map coordinates 'seg#.hdr'
8. ASCII file with latitude, longitude, and aircraft altitude of cooresponding segment 'seg#_0_0.pos' where the last two numbers represent waveform and channel. There are 4 waveforms and as many as 8 channels

'seg#' refers to the segment number ie: 0_3, 3_7, 7_11 etc.

Products:

May 23 Outbound Flight Line

products for segment 0_3 | 0_3_thickness.gif
products for segment 3_7 | 3_7_thickness.gif
products for segment 7_11 | 7_11_thickness.gif
products for segment 11_15 | 11_15_thickness.gif
products for segment 15_19 | 15_19_thickness.gif
products for segment 19_23 | 19_23_thickness.gif
products for segment 23_27 | 23_27_thickness.gif
products for segment 27_31 | 27_31_thickness.gif
products for segment 31_34 | 31_34_thickness.gif
products for segment 34_38 | 34_38_thickness.gif
products for segment 38_42 | 38_42_thickness.gif

May 23 Inbound Flight Line

products for segment 42_46 | 42_46_thickness.gif
products for segment 46_50 | 46_50_thickness.gif
products for segment 50_54 | 50_54_thickness.gif
products for segment 54_58 | 54_58_thickness.gif
products for segment 58_62 | 58_62_thickness.gif
products for segment 62_66 | 62_66_thickness.gif
products for segment 66_70 | 66_70_thickness.gif
products for segment 70_74 | 70_74_thickness.gif
products for segment 74_78 | 74_78_thickness.gif
products for segment 78_82 | 78_82_thickness.gif
products for segment 82_86 | 82_86_thickness.gif
products for segment 86_89 | 86_89_thickness.gif


Sept 10 2007 450MHz Data Products

Each flight line was segmented into approximatley 25km long sections with 20% overlap on each end. Since there were only 4 channels for these data, good left-right separation was not possible, thus there is no image or thickness data available for 2007. The following is what is included in the product zip files:
1. ASCII file with latitude, longitude, and aircraft altitude of cooresponding segment 'seg#_0_0.pos' where the last two numbers represent waveform and channel. There are 4 waveforms and as many as 8 channels
2. 450MHz (sept 10) intensity data 32 bit float binary, 5X25m (pixel x line) resolution which includes both the surface and base part. Slant range imagary can be used to get the nadir thickness information. 'seg#_inten'
3. Azimuth compressed header file with colum, row, resolution, wavelength, and # looks 'seg#_0_0.azcom.par'
4. Azimuth compressed nadir file with latitude, longitude of first pixel of each azimuth line in the slant range image, aircraft altitude, and roll angle in degrees (last column) 'seg#_0_0.azcom.nadir'
5. 450MHz (sept 10) Surface/Base profile gives an estimate (may not be exact in some areas) of the surface and the base profile 'seg#_surface_base.profile' *note not all segments have this file*

Ice_elevation= (base_pixel - surface_pixel)*5.0/1.8(m)

'seg#' refers to the segment number ie: 0_3, 3_7, 7_11, 100_110 etc.

Schematic labeling the inbound and outbound flight lines

Products:

2007 Sept 10 450MHz Outbound Flight Line A

products for segment 130_140
products for segment 140_150
products for segment 150_160
products for segment 160_167

2007 Sept 10 450MHz Outbound Flight Line B

products for segment 194_200
products for segment 200_210
products for segment 210_220
products for segment 220_230
products for segment 230_240
products for segment 240_250
products for segment 250_260
products for segment 260_269
products for segment 271_280
products for segment 280_288
products for segment 290_296

2007 Sept 10 450MHz Inbound Flight Line A
products for segment 169_180
products for segment 180_192

2007 Sept 10 450MHz Inbound Flight Line B

products for segment 298_310
products for segment 306_314
products for segment 310_320
products for segment 320_330
products for segment 330_340


Sept 12 2007 150MHz Data Products

Each flight line was segmented into approximatley 25km long sections with 20% overlap on each end. Since there were only 4 channels for these data, good left-right separation was not possible, thus there is no image or thickness data available. The following is what is included in the product zip files:
1. ASCII file with latitude, longitude, and aircraft altitude of cooresponding segment 'seg#_0_0.pos'
2. 150MHz (sept 12) Intensity data 32 bit float binary, 5X25m (pixel x line) resolution which includes both the surface and base part. Slant range imagary can be used to get the nadir thickness information. 'seg#_inten'
3. Azimuth compressed header file with colum, row, resolution, wavelength, and # looks 'seg#_0_0.azcom.par'
4. Azimuth compressed nadir file with latitude, longitude of first pixel of each azimuth line in the slant range image, aircraft altitude, and roll angle in degrees (last column) 'seg#_0_0.azcom.nadir'
5. 150MHz (sept 10) Surface/Base profile gives an estimate (may not be exact in some areas) of the surface and the base profile 'seg#_surface_base.profile'

Ice_elevation= (base_pixel - surface_pixel)*5.0/1.8(m)
6. Image, thickness, and header data for two segments 450_460 and 480_490 'seg#_image, seg#_thickness, and seg#.hdr'
7. Image and thickness geoTIFF's for segments 450_460 and 480_490 'seg#_image_geo.tif' and 'seg#_thickness_geo.tif'
8. Thickness data graphic for segments 450_460 and 480_490 'seg#.thickness.tiff'

'seg#' refers to the segment number ie: 0_3, 3_7, 7_11, 100_110 etc.

PRODUCTS

2007 Sept 12 150MHz Outbound Flight Line

products for segment 231_240
products for segment 240_250

2007 Sept 12 150MHz Inbound Flight Line

products for segment 255_262
products for segment 270_280
products for segment 280_290
products for segment 290_300
products for segment 300_310
products for segment 310_320
products for segment 320_330
products for segment 330_340
products for segment 340_350
products for segment 350_360
products for segment 360_370
products for segment 370_380
products for segment 380_390
products for segment 390_400
products for segment 400_410
products for segment 410_420
products for segment 420_430
products for segment 430_440
products for segment 440_450
products for segment 450_460450_460.thickness.tiff
products for segment 460_470
products for segment 470_480
products for segment 480_490480_490.thickness.tiff
products for segment 490_500


2008 Low Aircraft Elevation Data Products

Each flight line was segmented into approximately 25km long sections with 20% overlap on each end. Each segment contains the following data in a zip file:

1. Thickness data 32 bit float binary, 20m pixel resolution 'seg#_thickness'
2. Thickness data GEOtiff, 20m, 'seg#_thickness_geo.tif'
3. Thickness data graphic 'seg#.thickness.tiff'
4. Image data 32 bit float binary, 20m pixel resolution 'seg#_image'
5. Image data GEOtiff, 20m, 'seg#_image_geo.tif'
6. Header file with columns, rows, projection information, and corner map coordinates 'seg#.hdr'
7. ASCII file with latitude, longitude, and aircraft altitude of corresponding segment 'seg#_0_0.pos' where the last two numbers represent waveform and channel. There are 4 waveforms and as many as 8 channels
8. Intensity graphic 'seg#_inten.tif' where the along track is in the vertical direction and the cross track (slant range) is in the horizontal direction from left to right. The brightest part on the left is the ice surface. There are discontinuities between the surface and the base resulting from different azimuth looks. Only two looks are used to create the surface portion (left) and 20 looks are used to create the base portion (right). The white line (right) represents the base and is an estimate of the nadir profile.

Example of intensity tif 310_320_inten.tif

'seg#' refers to the segment number ie: 0_3, 3_7, 7_11 etc.

Low aircraft elevation data and high elevation data overlap.
thick red line = high elevation
thin black dotted line = low aircraft elevation

PRODUCTS

Outbound Flight Line

products for segment 0_70_7.thickness.tiff
products for segment 9_209_20.thickness.tiff
products for segment 20_30 note: 20_30 data segment corrupt. Intenstity graphic and ASCII file only
products for segment 30_3730_37.thickness.tiff
products for segment 39_5039_50.thickness.tiff
products for segment 50_6050_60.thickness.tiff
products for segment 60_7060_70.thickness.tiff
products for segment 70_8070_80.thickness.tiff
products for segment 80_9080_90.thickness.tiff
products for segment 90_10090_100.thickness.tiff

Inbound Flight Line

products for segment 100_110100_110.thickness.tiff
products for segment 110_120110_120.thickness.tiff
products for segment 120_130120_130.thickness.tiff
products for segment 130_140130_140.thickness.tiff
products for segment 140_150140_150.thickness.tiff
products for segment 150_160150_160.thickness.tiff
products for segment 162_170162_170.thickness.tiff
products for segment 280_290280_290.thickness.tiff
products for segment 290_300290_300.thickness.tiff
products for segment 300_310300_310.thickness.tiff
products for segment 310_320310_320.thickness.tiff

South Bound Flight Line

products for segment 190_200190_200.thickness.tiff
products for segment 200_210200_210.thickness.tiff
products for segment 210_220210_220.thickness.tiff
products for segment 220_230220_230.thickness.tiff
products for segment 230_240230_240.thickness.tiff
products for segment 240_250240_250.thickness.tiff

North Bound Flight Line

products for segment 250_260250_260.thickness.tiff
products for segment 260_270260_270.thickness.tiff
products for segment 270_280270_280.thickness.tiff
products for segment 162_170162_170.thickness.tiff
products for segment 170_180170_180.thickness.tiff
products for segment 180_190180_190.thickness.tiff


2008 High Elevation Data Products

Each flight line was segmented into approximatley 25km long sections with 20% overlap on each end. Each segment contains the following data in a zip file:

1. Elevation data 32 bit float binary, 20m pixel resolution 'seg#_elevation'
2. Elevation data GEOtiff, 20m, 'seg#_elevation_geo.tif'
3. Elevation data graphic 'seg#.elevation.tiff'
4. Image data 32 bit float binary, 20m pixel resolution 'seg#_image'
5. Image data GEOtiff, 20m, 'seg#_image_geo.tif'
6. Header file with columns, rows, projection information, and corner map coordinates 'seg#.hdr'
7. Base Intensity data 32 bit float binary, 5X25m (pixel x line) resolution which include both the surface and base part. This slant range image can be used to get the nadir elevation information and as a reference to the elevation maps. 'seg#_base_inten'
8. Azimuth compressed header file with colum, row, resolution, wavelength, and # looks 'seg#_0_0.azcom.par'
9. Azimuth compressed nadir file with latitude, longitude of first pixel of each azimuth line in the slant range image and roll angle in degrees (last column) 'seg#_0_0.azcom.nadir'
10. Surface/Base profile gives an estimate (may not be exact in some areas) of the surface and the base profile 'seg#_surface_base.profile'.*note: not all segments have this file*

ice_thickness= (base_pixel - surface_pixel)*5.0/1.8(m)

'seg#' refers to the segment number ie: 0_3, 3_7, 7_11, 100_110 etc.

The low aircraft data and high elevation data overlap
thick red line = surface elevation
thin black dotted line = low aircraft elevation

PRODUCTS

2008 Outbound Flight Line

products for segment 20_3020_30.elevation.tiff
no surface_base.profile file
products for segment 32_4032_40.elevation.tiff
products for segment 40_4540_45.elevation.tiff
products for segment 47_5347_53.elevation.tiff
products for segment 55_6055_60.elevation.tiff
no surface_base.profile file
products for segment 60_6960_69.elevation.tiff
products for segment 71_8071_80.elevation.tiff
products for segment 80_9080_90.elevation.tiff

2008 Inbound Flight Line

products for segment 90_10090_100.elevation.tiff
products for segment 100_108
100_108.elevation.tiff
products for segment 108_113108_113.elevation.tiff
products for segment 115_120
115_120.elevation.tiff
products for segment 130_139130_139.elevation.tiff
products for segment 141_145141_145.elevation.tiff
no surface_base.profile file
products for segment 147_155147_155.elevation.tiff
products for segment 155_162155_162.elevation.tiff
no surface_base.profile file
products for segment 166_173166_173.elevation.tiff
products for segment 173_180173_180.elevation.tiff
products for segment 180_190180_190.elevation.tiff

2008 South bound Flight Line

products for segment 213_220213_220.elevation.tiff
no surface_base.profile file
products for segment 220_230220_230.elevation.tiff
products for segment 230_239230_239.elevation.tiff
products for segment 241_250 241_250.elevation.tiff
products for segment 250_257 250_257.elevation.tiff
products for segment 261_271 261_271.elevation.tiff

2008 North bound Flight Line

products for segment 190_198 190_198.elevation.tiff
products for segment 198_205 198_205.elevation.tiff
products for segment 207_213 207_213.elevation.tiff
products for segment 271_281 271_281.elevation.tiff
products for segment 283_290 283_290.elevation.tiff

2008 Coastal Flight Line

products for segment 290_300 290_300.elevation.tiff
products for segment 300_310 300_310.elevation.tiff
no surface_base.profile file
products for segment 310_316 310_316.elevation.tiff
no surface_base.profile file

Get SAR Data

Get SAR Data

Select and download SAR data online using Vertex.

Use the ASF API for downloading SAR data via a command line.