NASA Distributed Active Archive Center (DAAC) at NSIDC

Polar Stereographic Data

Data Sets in the Polar Stereographic Projection

Data Extraction Tools

The data extraction tools allow the user to extract and read the data from the data files. The data extraction tools that are availabe are the following; click on the links for more information about that tool:

 

Tool Name extract.pro
Applicable Data Sets DMSP SSM/I Daily Polar Gridded Brightness Temperatures
Nimbus-5 ESMR Polar Gridded Brightness Temperatures
Near Real-Time DMSP SSM/I Daily Polar Gridded Brightness Temperatures
Description IDL program that allows you to open a brightness temperature grid file and read it into an array, making it available for further manipulation in IDL or to write to hard disc. After the program has read the user-indicated time range, an array is returned with a 2-byte integer array of brightness temperatures expressed in tenths of a kelvin (0.1 K). For example, a value of 2358 translates to 235.8 K.
Access FTP
Usage Example IDL Routines for Passive Microwave Data: Usage Examples - extract.pro


Tool Name extract_ice.pro
Applicable Data Sets Nimbus-5 ESMR Polar Gridded Sea Ice Concentrations
Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I Passive Microwave Data
Bootstrap Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I
Near-Real-Time DMSP SSM/I-SSMIS Daily Polar Gridded Sea Ice Concentrations
Description IDL program that extracts a time series of polar sea ice data. The extraction routine works on both the daily and monthly sea ice files allowing users to select and display sea ice concentrations. For monthly data, users may select which image threshold to view (0, 5, 10, or 15% ice cut off).
Access FTP
Usage Example IDL Routines for Passive Microwave Data: Usage Examples - extract_ice.pro