Data Set ID:
NSIDC-0027

TOVS Pathfinder Path-P Daily and Monthly Polar Gridded Atmospheric Parameters, Version 1

The TIROS-N Operational Vertical Sounder (TOVS) Polar Pathfinder (Path-P) data set consists of gridded daily and monthly Arctic and Antarctic atmospheric data derived from various NOAA satellites. TOVS Path-P daily files are available for the Northern and Southern Hemispheres from 60 degrees poleward at 100 km gridded spatial resolution in an Equal-Area Scalable Earth Grid (EASE-Grid). TOVS Path-P monthly files are available for the Northern Hemisphere only from 60 degrees poleward at 100 km gridded spatial resolution in EASE-Grid. Daily and monthly Northern Hemisphere data are available from January 1979 through current processing, and daily Southern Hemisphere data are available from July 1979 through current processing. Data were created from a modified version of the Improved Initialization Inversion Algorithm (3I) (Chedin et al. 1985), a physical-statistical retrieval method improved for use in identifying geophysical variables in snow- and ice-covered areas (Francis 1994).

This is the most recent version of these data.

Version Summary:

Initial release

STANDARD Level of Service

Data: Data integrity and usability verified

Documentation: Key metadata and user guide available

User Support: Assistance with data access and usage; guidance on use of data in tools

See All Level of Service Details

Parameter(s):
  • ATMOSPHERIC TEMPERATURE > SURFACE TEMPERATURE > AIR TEMPERATURE
  • CLOUDS > CLOUD PROPERTIES > CLOUD FRACTION
  • CLOUDS > CLOUD MICROPHYSICS > CLOUD PRECIPITABLE WATER
  • CLOUDS > CLOUD PROPERTIES > CLOUD TOP PRESSURE
  • CLOUDS > CLOUD PROPERTIES > CLOUD TOP TEMPERATURE
  • ATMOSPHERIC RADIATION > EMISSIVITY
Data Format(s):
  • HDF
Spatial Coverage:
N: 90, 
N: -60, 
S: 60, 
S: -90, 
E: 180, 
E: 180, 
W: -180
W: -180
Platform(s):NOAA-10, NOAA-11, NOAA-12, NOAA-14, NOAA-6, NOAA-7, NOAA-8, NOAA-9
Spatial Resolution:
  • 100 km x 100 km
Sensor(s):MSU, TOVS
Temporal Coverage:
  • 1 January 1979 to 31 December 2005
  • 12 July 1979 to 31 December 2001
(updated 2008)
Version(s):V1
Temporal Resolution1 day, 1 monthMetadata XML:View Metadata Record
Data Contributor(s):Jennifer Francis, Axel Schweiger

Geographic Coverage

Once you have logged in, you will be able to click and download files via a Web browser. There are also options for downloading via a command line or client. For more detailed instructions, please see Options Available for Bulk Downloading Data from HTTPS with Earthdata Login.

As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Francis, J. A. and A. J. Schweiger. 1999, updated 2008. TOVS Pathfinder Path-P Daily and Monthly Polar Gridded Atmospheric Parameters, Version 1. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/7L44Z9QVXUNL. [Date Accessed].

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No technical references available for this data set.

FAQ

TOVS Path-P Missing Data Files
The TOVS Level 1b data for some days were either unavailable or of insufficient quality to use as ingest into the Path-P processing algorithm. Currently, empty files exist as placeholders for these dates until compatible data can be obtained. 1979: day 001 through day 192 1980: day 062, 063, 159,... read more
How do I convert an HDF/HDF-EOS file into binary format?
To convert HDF or HDF-EOS files into binary format you can use the hdp utility, which is part of the HDF4 distribution available from the HDF Group. How you install HDF4 depends on your operating system. Full instructions for installing and using hdp on Mac/Unix and... read more

How To

Programs Developed for the TOVS Path-P Daily Data
List of Available Files The following program files are available for download via HTTPS, along with the TOVS Pathfinder Path-P Daily and Monthly Polar Gridded Atmospheric Parameters data files, in the /tools/ directory.... read more
TOVS Path-P IDL Tools Tutorial
Introduction NSIDC developed a number of IDL programs to browse and visualize TOVS Pathfinder Path-P Daily and Monthly Polar Gridded Atmospheric Parameters data files. The IDL tools described in this tutorial are available via... read more
V0 Programmatic Data Access Guide
Data from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) can be accessed directly from our HTTPS file system. We provide basic command line Wget and curl instructions for HTTPS file system downloads below. For questions about programmatic access to NSIDC... read more