============================= iqtapsdef.txt =================================
This file defines the columns of data in the iqtaps.log files produced by the
GRID software receiver.  The iqtaps.log files contain symaccumulation-length
in-phase and quadrature symaccumulation data. A symaccumulation is a coherent
accumulation that is time-aligned with data modulation (if any) and of length
equal to the minimum of the symbol interval and the standard accumulation
interval. See channeldef.txt for a definition of RRT.  Time stamps in RRT
correspond to the end of the interval over which each in-phase and quadrature
symaccumulation was computed.
=============================================================================


Column            Quantity

1 --------------- RRT week number.

2 --------------- RRT seconds of week.

13 -------------- Signal type: An encoded value representing the GenericType
                  and the Group that together specify a unique SignalType.
                  The encoded value is eqivalent to a single byte of data
                  formatted as [g g g T T T T T], where Group bits are marked
                  'g' and GenericType bits are marked 'T'. See signaltype.h
                  for GenericType and Group values.

4 --------------- Transmitter identification number (TXID).

i=5,...,N+4 ----- In-phase symaccumulation corresponding to the ith tap of N
                  total taps over the interval ending at the specified RRT, in
                  receiver front-end units. If the signal is data-bit
                  modulated, then the data bit modulation has been wiped off
                  assuming the corresponding data bit value given in iq.log.

i=N+5,...,2*N+4 - Quadrature symaccumulation corresponding to the ith tap of N
                  total taps over the interval ending at the specified RRT, in
                  receiver front-end units.  If the signal is data-bit
                  modulated, then the data bit modulation has been wiped off
                  assuming the corresponding data bit value given in iq.log.

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