%%%% Wind Data Files:

	Wind data files are available in 3 formats: ascii, matlab, and netcdf. To download, 
	go to http://sisko.colorado.edu/sutton/data.html and click on the year of the desired data 
	under the 'Wind' heading. 

	To download the entire year of data, click on the file named 'Wind_3deg_yyyy.format.tar.gz', 
	where 'yyyy' is the desired year and 'format' is the desired file format ('ascii', 'mat', or 'nc'). 

	To download one day of data at a time, click on the directory named after the desired format 
	('ascii/', 'matlab/', or 'netcdf/'). In this directory, data files for individual days are 
	named 'Wind_3deg_yy_doy.format', where 'yy' is the 2-digit year, 'doy' is the day of the year, 
	and 'format' is the desired file format ('ascii', 'mat', or 'nc').




%%%% Format Description:

	All Wind data has been averaged into 3-degree latitudinal bins to conserve space and reduce 
	any random errors. The bins are centered around lat = [-90:3:90] deg, omitting any values 
	for which there are 0 data points in the averaging bin.




%%%% Ascii Format: 

	Ascii files are arranged in columnn format with a 1-line header of Descriptions 
	including units used) separated by semi-colons (;). The length of the files is 
	approximately 1840 lines.

	Column:			Format:		Description:			Units:
	------------------------------------------------------------------------------------
	[1-2]			2I		Two-digit Year			years
	[4-6]			3I		Day of the Year			days
	[8-15]			8.2F		Second of the Day		GPS time,sec
	[17-19]			3I		Latitude Center of 		deg
						Current Averaging Bin
	[21-29]			9.5F		Geodetic Latitude		deg
	[31-40]			10.5F		Longitude			deg
	[42-48]			7.3F		Satellite Height		km
	[50-56]			7.4F		Satellite Local Time		hours
	[58-66]			9.3F		Wind Speed			m/s
	[68-75]			8.5F		East Component
						Horizontal Unit Vector
						of Cross-track Direction
	[77-84]			8.5F		North Component
						Horizontal Unit Vector
						of Cross-track Direction
	[86-93]			8.3F		Wind Uncertainty		m/s
	[95-96]			2I		Number of Data Points 
						in Current Averaging Bin
	[98-99]			2I		Number of Points that
						Require Interpolation




%%%% Matlab and Netcdf Format:

	Matlab and Netcdf formats are identical. The variables below are structure arrays 
	containing '.data', '.units', and '.long_name'. For most of the variables, the 
	size of the '.data' structure is n by 1, where n is approximately 1840.

	Variable Name:		Size:		.long_name:			.units:
	--------------------------------------------------------------------------------
	Year.data		1x1		Two-digit Year			years
	Doy.data		1x1		Day of the Year			days
	Sec.data		nx1		Second of the Day		GPS time,sec
	LatBin.data		nx1		Latitude Center of		deg
						Current Averaging Bin
	Lat.data		nx1		Geodetic Latitude		deg
	Lon.data		nx1		Longitude			deg
	Height.data		nx1		Satellite Height		km
	LocTim.data		nx1		Satellite Local Time		hours
	Wind.data		nx1		Cross-track Wind Speed		m/s
	East.data		nx1		East Component
						Horizontal Unit Vector
						of Cross-track Direction
	North.data		nx1		North Component
						Horizontal Unit Vector
						of Cross-track Direction
	U_wy.data		nx1		Uncertainty			m/s
	Num.data		nx1		Number of Data Points 
						in Current Averaging Bin
	NumInterp.data		nx1		Number of Points that
						Require Interpolation


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
These data are placed on this publicly-accessible web site as a service to the community. 
Individuals planning scientific investigations with these data should contact Professor 
Jeffrey M. Forbes at 'forbes@colorado.edu' to verify the status of possible new versions 
of the data, and to arrange coordination and/or collaboration with our ongoing scientific 
activities, as appropriate.

This work is supported by grants from the National Science Foundation (NSF) Space Weather 
Program, the Air Force Office of Scientific Research (AFOSR), and the NASA Graduate 
Student Research Program (GSRP).