GUVI Global Ultraviolet Imager

GUVI Global Ultraviolet Imager

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USING GUVI DATA

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GUVI DATA PRODUCTS

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The GUVI data products are all written using a platform independent binary file format called NetCDF (Network Common Data Format) and are not human-readable. Readers for the individual GUVI data product files are available in both C++ and IDL in the table below and NetCDF has a utility called ncdump which will display any NetCDF file as ASCII text. To use the the GUVI C++ data readers or ncdump, NetCDF must be installed on your machine and is available free of charge from the Unidata Program Center.

GUVI DATA Products
Data Level			Reader Language	Brief Description
1A			C++, IDL	Time and position tagged data
1B			C++, IDL	Binned in GUVI coordinates
1C	Disk		C++, IDL	Calibrated and geolocated
2B	Disk	Day	C++, IDL	Routine key parameters
	Limb	Day	C++, IDL
	Limb	Night	C++, IDL
3			C++, IDL	Products encompassing multiple orbits
Supporting Data Files			ASCII	GUVI Instrument housekeeping data

Shared Tools

L1A_qlook GUVI Data browser IDL 7-Mar-2002 Y. Zhang	L1A_qlook download	Quicklook data browser for the GUVI Level 1A data products.
L1B_qlook GUVI Data browser IDL 7-Mar-2002 Y. Zhang	L1B_qlook download	Quicklook data browser for the GUVI Level 1B data products.
Aerospace SIS Browser GUVI Data browser IDL 1-Apr-2002 M. Redding	Available upon request	Ingests raw GUVI telemetry and displays GUVI L1A and L1B data.
ReadL1ANetCDF GUVI L1A data reader C++ 20-Jan-2002 M. Weiss	ReadL1ANetCDF download	Reads in a GUVI Level 1A data file.
ReadL1BNetCDF GUVI L1B data reader C++ 20-Jan-2002 M. Weiss	ReadL1BNetCDF download	Reads in a GUVI Level 1B data file.
ReadL1CNetCDF GUVI L1C data reader C++ 20-Jan-2002 M. Weiss	ReadL1CNetCDF download	Reads in a GUVI Level 1C data file.
ReadL2BNetCDF GUVI L2B data reader C++ 20-Jan-2002 M. Weiss	ReadL2bNetCDF download	Reads in a GUVI Level 2B data file.
aa_sun.pro Shared software IDL 20-Oct-2002 B. DeMajistre	aa_sun.pro download	Calculates the position of the sun.
timed_sun_angle.pro Shared software IDL 05-Nov-2002 B. DeMajistre	timed_sun_angle.pro download	Calculates sun position at a given time from the PVAT file.
guvi_pvat.pro Shared software IDL 19-Feb-2003 B. DeMajistre	guvi_pvat.pro download	Provides PVAT data on GUVI time grid. Performs a simple linear interpolation of the PVAT data onto the GUVI time grid.

Information about NetCDF:
http://www.unidata.ucar.edu/staff/russ/netcdf/guidec/guidec-15.html#MARKER-2-3254

The Johns Hopkins University Applied Physics Laboratory The Last Updated: March 14, 2008