COMMAND NAME:	parameter

TYPE:		Action

SYNTAX:		"parameter 1 2 3 ..."	(non-interactive form)
		"parameter"		(interactive form)

DESCRIPTION:

This command causes all unedited type 2 data in memory to be treated as the
basis for a parameter extraction operation from disk-resident type-2 files.
Specified parameters are placed in a special array attached to each type-2 line
in memory.  The parameter specification is via key numbers.  These numbers
may be specified either directly on the input line of the parameter command,
or in response to a query from the program if no parameter keys are given.
In batch mode, aedit assumes that the former mechanism is being used, and
the absence of any keys is treated as an error.  Once extracted, the parameters
may be written to a file of the user's choice, using the pwrite command.

Obviously, aedit cannot extract parameters unless the relevant type-2 files are
on the disk.  Make sure the DATADIR environment variable is pointing to the 
correct data area.

Each invocation of the parameter command obliterates all previous parameters
extracted for a previous subset of unflagged data lines.

Below is a list of the available parameters, and their index numbers which
must be supplied in a space-delimited list.  The total number of parameters 
allowed is currently 256, and each array of parameters (marked with a *
below) counts one for each array element, up to the maximum allowed number
of frequency channels (64).  An index number in parentheses indicates 
that the parameter is already in memory, but can be selected as a parameter 
for manipulation and output like the others

\begin{verbatim}
INDEX  PARAMETER NAME                   INDEX  PARAMETER NAME
-----  --------------                   -----  --------------
 1:    ref_pcal_amp (*)                 34:    lo_frequency (*)
 2:    ref_pcal_phase (*)               35:    xperror
 3:    ref_pcal_diff (*)                36:    yperror
 4:    ref_pcal_freq (*)                37:    suppress
 5:    ref_pcal_rate                    38:    ppupdate
 6:    rem_pcal_amp (*)                 39:    xslip
 7:    rem_pcal_phase (*)               40:    yslip
 8:    rem_pcal_diff (*)                41:    badsync
 9:    rem_pcal_freq (*)                42:    ref_drive
10:    rem_pcal_rate                    43:    rem_drive
11:    trkno_ref_usb (*)                44:    utc_central
12:    trkno_ref_lsb (*)                45:    utc_epoch
13:    trkno_rem_usb (*)                46:    clock_delay
14:    trkno_rem_lsb (*)                (51):  length
15:    errate_ref_usb (*)               (52):  timetag
16:    errate_ref_lsb (*)               (53):  amplitude
17:    errate_rem_usb (*)               (54):  snr
18:    errate_rem_lsb (*)               (55):  phase
19:    nap_usb (*)                      (56):  resid_sbd
20:    nap_lsb (*)                      (57):  resid_mbd
21:    corel_amp (*)                    (58):  ambiguity
22:    corel_phase (*)                  (59):  resid_rate
23:    rate_error                       (60):  ref_elevation
24:    mbdelay_error                    (61):  rem_elevation
25:    sbdelay_error                    (62):  ref_azimuth
26:    total_phase                      (63):  rem_azimuth
27:    tot_phase_mid                    (64):  u
28:    incoh_amp_seg                    (65):  v
29:    incoh_amp_freq                   (66):  ref_frequency
30:    mhz_arcsec_ns                    (67):  total_ec_phase
31:    mhz_arcsec_ew                    (68):  total_rate
32:    pcnt_discard                     (69):  total_mbd
33:    min_max_ratio                    (70):  total_sbd-mbd
                                        (71):  procdate
                                        (72):  qcode
\end{verbatim}