Weighing file headers

StTime = start time (d{MJD})       
FnTime = finish time (d{MJD})  
MasIsUp = Mass status (0=on or down, 1=off or up)
WCoil = Weighing coil ID (1 or 2)
PtIdx = Data point index number
Blocks = Data block index number  
Gain = Voltmeter nominal gain (V/V)       
VADC = Measured voltage (V)
JStep = Josephson Junction Array (JJA) step number [not applicable for this work]
JFreq = Frequency applied to JJA (GHz) [not applicable for this work]
ADCIdx = Voltmeter measurement index    
ITime = Current integration time (s)         
StPos = start position (mm)    
FnPos = end position (mm) 
ISrcHi = Current Source 1 (mA)
ISrcLo = Current Source 2 (mA)
EmuState = emulation status (0=off, >0=on)
