FORMAT DESCRIPTION FOR AEROS A RETARDING POTENTIAL ANALYZER DATA

This AEROS data set covers the time period from January 3, 1973 to August 3, 1973.
It provide the electron and ion densities and temperatures and photoelectron
fluxes for several energies.

NSSDC-ID: 1972-100A-02A
More information about the AEROS satellites, experiments and data sets can
found in NSSDC's Master Catalog at http://nssdc.gsfc.nasa.gov/nmc/.

There are 182,009 data records. 
There is a blank (1x) between each word.

Year			I4,1X	yyyy
Day of year @		I3,1X	ddd
Hour @			I2,1X	hh (Universal Time)
Minute @		I2,1X	mm
Second @		I5,1X	milliseconds
Local time (solar) @	F5.2,1X	[decimal hours] 
	LT is calculated from UT and Longitude. For a few cases the longitude
	value was corrupted in the original data. In these cases the Solar
	Time (hh, mm) as provided on the original data tape was used and was
	marked as a negative value.
Geomagnetic local time 	F5.2,1X	[decimal hours]
Solar zenith angle      F5.1,1X	[degree]
Mean Julian date (1)    I4,1X	[days]
Mean Julian date (2)	I6,1X	[1.e-6 days]
Geodetic latitude       F6.2,1X	[degrees]
Geodetic longitude      F6.2,1X	[degrees] East
Geomagnetic latitude    F6.2,1X	[degrees]
Geomagnetic longitude   F6.2,1X	[degrees] East
Magnetic inclination    F6.2,1X	[degrees]
Magnetic declination    F6.2,1X	[degrees]
Modified dip latitude   F6.2,1X	[degrees]
Invariant latitude      F6.2,1X	[degrees]
L value                 F5.2,1X	McIlwain index
Magnetic field          I3,1X	[100 nT] at satellite height
Altitude                F6.2,1X	[km]
F10.7                   I3,1X
Sunspot number          I3,1X
Kp index                I3,1X	Kp*10 (3- = 27, 3+ = 33, 3o = 30)
Ap index                I2,1X	
Satellite               I1,1X 	(1 - Aeros A, 2 - Aeros B)
Orbit number            I5,1X	only active orbits are counted; about every
                                second orbit the power was off.
Mode                    I1,1X	1   - Ne, Te, and photoelectron fluxes 
                                2,6 - only Ne and Te
                                3,4 - Ne, Te, Ti and ion composition 
log10(Ne)               F7.4,1X	[Ne/m-3]
log10(Ne)               F7.4,1X	[Ne/m-3]  a second density measurement
log10(Ni) $             F7.4,1X	[Ni/m-3]  uncorrected
log10(Ni)cor $          F7.4,1X	[Ni/m-3]  multiplied by correction factor 
                                          1.25obtained from comparisons  
                                          with other AEROS data
log10(Ef1)*             F7.4,1X Logarithm of electron flux [m-2 s-1]
                                for E < 5eV 
log10(Ef2)*             F7.4,1X Logarithm of electron flux for E < 8eV
log10(Ef3)*             F7.4,1X Logarithm of electron flux for E < 10eV
log10(Ef4)*             F7.4,1X Logarithm of electron flux for E < 12eV
log10(Ef5)*             F7.4,1X Logarithm of electron flux for E < 21eV
Electron temperature    I4,1X	[K]  
Ion temperature $       I4,1X	[K]	
light ions              F4.1,1X	Percentage of light ions
atomic ions $           F4.1,1X	Percentage of atomic ions
molcular ions $         F4.1,1X	Percentage of molecular ions
He+ ions                F4.1,1X	Percentage of helium ions
Offset ion density      F5.2,1X	Precentage of additional ions 
Potential               I4	[10 mV]  
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	* only given when mode=1
	$ only given when mode=3 or 4
	@ computed from the modified julian date and time given given on tape