NOAA PolarWatch ERDDAP
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Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL defaultGraphQuery String longitude%2Clatitude%2CElevation%26time%3E%3D2018-04-10T00%3A00%3A00Z%26time%3C%3D2018-04-17T00%3A00%3A00Z%26.draw=markers%26t.marker=6%7C%26.color=0x000000%26.colorBar=KT_amp%7C%7C%7C%7C%7C
attribute NC_GLOBAL Easternmost_Easting double 179.9947664
attribute NC_GLOBAL geospatial_lat_max double 89.99707309
attribute NC_GLOBAL geospatial_lat_min double 67.23399119
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double 179.9947664
attribute NC_GLOBAL geospatial_lon_min double -179.99844221
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL infoUrl String https://www.star.nesdis.noaa.gov/sod/lsa/SeaIce/SurfaceElevation.php (external link)
attribute NC_GLOBAL institution String NOAA NESDIS STAR
attribute NC_GLOBAL keywords String along, along-track, Along_track_Distance, Along_Track_Grid_Cell_Number, cell, data, deviation, distance, elevation, grid, latitude, local, longitude, num, Num_Pts, number, pts, source, standard, Standard_Deviation, statistics, time, time2, track
attribute NC_GLOBAL license String The data may be used and redistributed for free but is not intended\nfor legal use, since it may contain inaccuracies. Neither the data\nContributor, ERD, NOAA, nor the United States Government, nor any\nof their employees or contractors, makes any warranty, express or\nimplied, including warranties of merchantability and fitness for a\nparticular purpose, or assumes any legal liability for the accuracy,\ncompleteness, or usefulness, of this information.
attribute NC_GLOBAL Northernmost_Northing double 89.99707309
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double 67.23399119
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v70
attribute NC_GLOBAL summary String This dataset contains the NOAA / NESDIS / STAR / LSA Polar Ocean Data System (PODS) Arctic Gridded Surface Elevation Product. The Gridded Surface Elevation Product is derived from Airborne Topographic Mapper (ATM) lidar elevation data acquired during annual, low-altitude NASA Operation IceBridge airborne surveys over Arctic sea ice. IceBridge ATM data were acquired between March and May, 2009 - 2019. Due to the conical scanning geometry of the ATM lidar, across-track sampling is non-uniform, with sampling density greatest at the swath edges. To account for the variation in sample density, ATM elevation data are gridded (See Figure 1 on Data Product Webpage). Each grid cell has an along-track dimension of 30 m and an across-track dimension that is inversely proportional to the across-track sampling density. The grid configuration optimizes ATM sample density providing high-resolution measurements of elevation while still containing enough point measurements for robust statistical calculations. Citation: Users are asked to cite the following publication whenever these data are used:\n            Connor, L., S. Farrell and D. McAdoo (2017), A decadal study of interannual variability in Arctic sea ice freeboard using airborne laser altimetry (2006-2016), presented at the 2017 IGS International Symposium on Polar Ice, Polar Climate, and Polar Change, Boulder, Colorado, 14-19 Aug. 2017.\n        Point of Contact: Laurence.Connor@noaa.gov\n        Data Product Webpage: https://www.star.nesdis.noaa.gov/sod/lsa/SeaIce/SurfaceElevation.php
attribute NC_GLOBAL time_coverage_end String 2018-04-16T16:30:20.114Z
attribute NC_GLOBAL time_coverage_start String 2009-03-31T12:28:04.781Z
attribute NC_GLOBAL title String Sea Ice Surface Elevation from IceBridge ATM LIDAR, Arctic, from 2009 to 2018 Airborne Surveys
attribute NC_GLOBAL Westernmost_Easting double -179.99844221
variable time double
attribute time _CoordinateAxisType String Time
attribute time actual_range double 1.238502484781E9, 1.523896220114E9
attribute time axis String T
attribute time comment String Time (seconds since 1970-01-01T00:00:00.000Z), minimum time of all ATM point measurements within 10 across-track grid cells\"
attribute time ioos_category String Time
attribute time long_name String Time
attribute time standard_name String time
attribute time time_origin String 01-JAN-1970 00:00:00
attribute time time_precision String 1970-01-01T00:00:00.000Z
attribute time units String seconds since 1970-01-01T00:00:00Z
variable Along_track_Distance float
attribute Along_track_Distance actual_range float 1000.0, 2002000.0
attribute Along_track_Distance comment String Along-track distance (meters), relative to the beginning of the flight line
attribute Along_track_Distance ioos_category String Unknown
attribute Along_track_Distance long_name String Along-track Distance
attribute Along_track_Distance units String meters
variable Across_Track_Grid_Cell_Number byte
attribute Across_Track_Grid_Cell_Number _FillValue byte 127
attribute Across_Track_Grid_Cell_Number actual_range byte 1, 10
attribute Across_Track_Grid_Cell_Number colorBarMaximum double 100.0
attribute Across_Track_Grid_Cell_Number colorBarMinimum double 0.0
attribute Across_Track_Grid_Cell_Number ioos_category String Statistics
attribute Across_Track_Grid_Cell_Number long_name String Cross-Track Grid Cell Number
variable longitude double
attribute longitude _CoordinateAxisType String Lon
attribute longitude _FillValue double NaN
attribute longitude actual_range double -179.99844221, 179.9947664
attribute longitude axis String X
attribute longitude colorBarMaximum double 180.0
attribute longitude colorBarMinimum double -180.0
attribute longitude comment String Longitude (degrees), mean longitude of ATM point measurements within grid cell
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable latitude double
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double NaN
attribute latitude actual_range double 67.23399119, 89.99707309
attribute latitude axis String Y
attribute latitude colorBarMaximum double 90.0
attribute latitude colorBarMinimum double -90.0
attribute latitude comment String Latitude (degrees), mean latitude of ATM point measurements within grid cell
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
variable Elevation float
attribute Elevation _FillValue float NaN
attribute Elevation actual_range float -16.521, 50.0
attribute Elevation comment String Elevation (meters, relative to WGS84 ellipsoid), mean elevation of ATM elevation point measurements within grid cell
attribute Elevation ioos_category String Location
attribute Elevation long_name String Elevation
attribute Elevation units String meters
variable Standard_Deviation float
attribute Standard_Deviation _FillValue float NaN
attribute Standard_Deviation actual_range float 0.0, 4.3024
attribute Standard_Deviation colorBarMaximum double 50.0
attribute Standard_Deviation colorBarMinimum double 0.0
attribute Standard_Deviation comment String Standard Deviation (meters), standard deviation of ATM elevation point measurements within grid cell
attribute Standard_Deviation ioos_category String Statistics
attribute Standard_Deviation long_name String Standard Deviation
attribute Standard_Deviation units String meters
variable Num_Pts float
attribute Num_Pts actual_range float 0.0, 1543.0
attribute Num_Pts comment String Number of ATM point measurements within grid cell
attribute Num_Pts ioos_category String Unknown
attribute Num_Pts long_name String Number of Points

 
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