Accessor for (Geotail EFD 64-sec Key Parameters)
Acknowledgment: CDAS services from NASA/Goddard Space Physics Data Facility (R. McGuire). Time span: Valid formats are YYYY-MM-dd,HH:mm and YYYY-DDD,HH:mm. (Times are optional.) If the end date is omitted, it will default to one day after the start date. Begin date: 1992-09-08,   End date: 2009-11-06. from:     to:
Parameter name	Parameter description
Es	Electric Field from spherical probe, sunwd & duskwd comp
Ss	Deviation of Electric Field from sin wave (sperical probe)
Bs	Bias Current from spherical probe
Vs	GE S/C potential from two spherical probes
Ew	Electric Field from wire antenna, sunwd & duskwd comp
Sw	Deviation of E field from sin wave (wire antenna)
Bw	Bias current from wire antenna
Vw	GE S/C potential 2 wire antennas
POSITION	GE position in GSE coord, 3 comp
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