INNAME UV data (name). INCLASS UV data (class). INSEQ 0.0 9999.0 UV data (seq. #). 0 => high INDISK 0.0 9.0 Disk unit #. 0 => any INEXT Input 'SN','TY','PC', 'CL' ' ' -> 'SY' INVERS Input table file version no. SOURCES Source list QUAL -10.0 Source qualifier -1=>all TIMERANG Time range to plot STOKES Stokes type to plot: R, L, RR, LL, RRLL, X, Y, XX, YY, XXYY SELBAND Bandwidth to plot (kHz) SELFREQ Frequency to plot (MHz) FREQID Freq. ID to plot, -1=>all SUBARRAY -1.0 Limit to subarray; 0 -> 1 -1 -> all BIF 0.0 100.0 First IF to plot, 0=>1. EIF 0.0 100.0 Last IF to plot 0 -> highest ANTENNAS Antennas to plot 0=>all PIXRANGE Range to plot: 0 => self scale each antenna separately NPLOTS 0.0 28.0 Number of plots per page ORDER 0.0 8.0 Order of polynomial to be fit individually to each plot OPTYPE Data to be plotted: 'PHAS','AMP ','DELA','RATE', 'TSYS','SUM ','DOPL','SNR ', 'MDEL','TANT','ATM ','GEO ', 'CCAL','DDLY','REAL','IMAG', 'IFR ','PDIF','PSUM','PGN ', 'PON ','POFF','PSYS','PDGN', 'PSGN','POWR','PODB','MULT' ' '=phase DO3COL -1.0 2.0 DO3COL=2 => color by source BCOUNT If INEXT ='PC' and OPTYPE = 'AMP' or 'PHAS, BCOUNT specifies the phase cal tone number to be plotted. 0->1. XAXIS -6.0 6.0 Variable data is to be fit against, 0=>elevation < 0 -> plot full range SYMBOL 0.0 24.0 Plot symbol number: 1 - 24 FACTOR -10.0 10.0 Scale plot symbols by FACTOR <0 => connect points too DOBLANK -1.0 24.0 > 0, show blanked values with symbol type DOBLANK CUTOFF Table weights <= CUTOFF will not be plotted, flagged data are not plotted. LTYPE -410.0 410.0 Type of labeling: 1 border, 2 no ticks, 3 - 6 standard, 7 - 10 only tick labels <0 -> no date/time DOTV -1.0 1.0 > 0 Do plot on the TV, else make a plot file GRCHAN 0.0 8.0 Graphics channel APARM (1) > 0 -> extrapolate XAXIS 1 and 2 types WEIGHT = APARM(1) (2) fiducal point 1 (3) fiducal point 2

ELFIT Type: Task Use: Plots selected calibration data versus time from a specified SN, TY, PC or CL table. It then fits polynomials in the x-axis parameter to the values. To examine SN or CL tables with a new reference antenna, run SNREF with DOKEEP=1 and then use ELFIT. Adverbs: INNAME.....UV file name (name). Standard defaults. INCLASS....UV file name (class). Standard defaults. INSEQ......UV file name (seq. #). 0 => highest. INDISK.....Disk unit #. 0 => any. INEXT......'SN','TY, 'PC', 'SY', or 'CL' table to be plotted INVERS.....Version number of table to plot, 0=>highest no. SOURCES....Source list. '*' = all; a "-" before a source name means all except ANY source named. QUAL.......Only sources with a source qualifier number in the SU table matching QUAL will be used if QUAL is not -1. TIMERANG...Time range of the data to be plotted. In order: Start day, hour, min. sec, end day, hour, min. sec. Days relative to reference date. The X-axis is plotted over the range of X values found in the data. All plots in a given execution will be on the same X scale in any case. STOKES.....The desired Stokes type of the displayed data: 'R' = RCP, 'L' = LCP, 'RL' or 'RRLL' both RCP and LCP 'X' = XLP, 'Y' = YLP, 'XY' or 'XXYY' both XLP and YLP SELBAND....Bandwidth of data to be selected. If more than one IF is present SELBAND is the width of the first IF required. Units = kHz. SELFREQ....Frequency of data to be selected. If more than one IF is present SELFREQ is the frequency of the first IF required. Units = MHz. FREQID.....Frequency identifier to select (you may determine which is applicable from the OPTYPE='SCAN' listing produced by LISTR). If either SELBAND or SELFREQ are set, their values overide that of FREQID. However, setting SELBAND and SELFREQ may result in an ambiguity. In that case, the task will request that you use FREQID. -1 => all, 0 => first SUBARRAY...Limit display to specific subarray. -1 -> all, 0 -> 1. BIF........First IF IF to plot EIF........Last IF to plot. If OPCODE = 'IFDF'/'IFRA' will plot difference/ratio of specified quantity between BIF and EIF. ANTENNAS...A list of the antennas to be plotted. All 0 => all. If any number is negative then all antennas listed are NOT to be plotted and all others are. PIXRANGE...If PIXR(1) < PIXR(2), all plots will be from PIXR(1) to PIXR(2). Otherwise each plot will be self-scaling. NPLOTS.....Number of antennas to plot per page (try 5). ORDER......Order of polynomial to be fit (0 - 6) OPTYPE.....Data to be plotted: 1. 'PHAS' = phase, 2. 'AMP ' = amplitude, 3. 'DELA' = singleband delay (SN & CL) 4. 'RATE' = rate (SN, CL & PC) 5. 'TSYS' = sys. temp. (TY) (for VLA is nominal sensitivity) 7. 'DOPL' = doppler offset (CL) 8. 'SNR' = signal/noise (SN & CL) 9. 'MDEL' = multiband delay (SN & CL) 10. 'TANT' = ant. temp. (TY) (for VLA either back- or front-end system temperature) 11. 'ATM' = atm. delay (CL) 12. 'GEO' = geometric delay (CL) 13. 'CCAL' = cable cal (PC) 14. 'DDLY' = dispersive delay (SN & CL) 15. 'REAL' = real part 16. 'IMAG' = imag part 17. 'IFR ' = Ionospheric Faraday rotation (affects pol cal) (SN & CL) 18. 'PDIF' = EVLA Gb * (Pon - Poff) (SY) 19. 'PSUM' = EVLA Gb * (Pon + Poff) (SY) 20. 'PGN ' = EVLA post sync-detector gain = Gb (SY) 21. 'PON ' = EVLA Pon (noise tube on) (SY) 22. 'POFF' = EVLA Poff (noise tube off) (SY) Note that PON and POFF give numbers smaller than PDIF and PSUM by the factor Gb which is, by default, 512 and usually ranges in the 400's when it has been set. 23. 'PSYS' = EVLA PSUM/PDIF/2 * Tcal (=Tsys) (SY) uses values from the CD table 24 'PDGN' = EVLA Pdif / (4096 * Pgain * Pgain) 25 'PSGN' = EVLA Psum / (4096 * Pgain * Pgain) 26. 'POWR' = (1/Gain amp)^2 27. 'PODB' = Log10 (1/Gain amp)^2 ' ' => 'PHAS' XX. 'MULT' => plot multiple types as listed in APARM using the type numbers given above. DO3COLOR...DO3COL = 2 tells ELFIT to separate the plotted points with color representing source. The list of source numbers actually occurring in the table, time range, source list, et al. is translated into consecutive integers (in the same order) and then assigned red through dark blue. Thus source numbers 1,2,3,10 become 4 equally spaced colors (red, yellow, cyan, blue). <= 0 => use line type 4 for all points plotted. BCOUNT.....If INEXT ='PC', and OPTYPE = 'AMP' or 'PHAS' then BCOUNT specifies the phase cal tone number to be plotted. 0 -> 1. XAXIS......Variable data is to be plotted against. 0 => 2 = 1 => Antenna zenith angle -1 plot 0 - 90 xenith ang = 2 => Antenna elevation -2 plot 0 - 90 elevation = 3 => Hour angle -3 plot -180 180 HA = 5 => Parallactic angle -5 plot -180 180 Parang = 6 => Antenna azimuth -6 plot 0 360 azimuth Minus signs cause plots to cover full possible range SYMBOL.....1: Plus sign (default) 12: Five pointed star 2: Cross (X) 13: Star of David 3: Circle 14: Seven-pointed star 4: Box 15: Eight-pointed star 5: Triangle 16: Nine-pointed star 6: Diamond 17: Ten-pointed star 7: Pentagon 18: 11-pointed star 8: Hexagon 19: 12-pointed star 9: Septagon 20: 13-pointed star 10: Octagon 21: 14-pointed star 11: Nine-gon 22: Plus with gap 23: vertical line 24: Cross with gap FACTOR.....Scale plot symbols by FACTOR 0 -> 1. If FACTOR < 0, draw lines between the points and use abs(FACTOR) to scale the points plotted. DOBLANK....> 0 => plot blanked solutions with a symbol of type DOBLANK (see symbol types above). They will be plotted along the lower edge of each plot. NOTE: if DOTV true and GRCHAN 0 and DO3COL <= 0, then the blanked samples will be in the color of graphics channel 3 (pink) and the good samples in the color of graphics channel 4 (blue). DOBLANK > 0 is forced to be different than SYMBOL by adding 1. CUTOFF.....If >= 0, the task will examine the weight column of the table and if the weight <= CUTOFF, the task will not plot that sample. If = 0, will plot all good points; flagged data are not plotted. CUTOFF is ignored for TY and PC tables and OPTYPEs MDEL, ATM, GEO, and CCAL. LTYPE......Labelling type, see HELP LTYPE for details: 1 = border, 2 = no ticks, 3 or 7 = standard, 4 or 8 = relative to ref. pixel, 5 or 9 = relative to subimage (BLC, TRC) center, 6 or 10 = pixels. 7-10 all labels other than tick numbers and axis type are omitted. Less than 0 is the same except that the plot file version number and create time are omitted. Add n * 100 to alter the metric scaling. DOTV.......> 0 => plot directly on the TV device, otherwise make a plot file for later display on one or more devices (including the TV if desired). GRCHAN.....Graphics channel (1 - 7) to use for line drawing. A value of 0 causes more than one graphics channel to be used. APARM......(1) If > 0, the data for XAXIS 1 and 2 is extrapolated to zenith angle 0 or elevation 90 weighting the 3 samples with APARM(1) (2) Fiducial point 1 - if XAXIS 1 (zenith angle) is low value default 20, if XAXIS 2 (elevation) is high value default 70 (3) Fiducial point 2 - if XAXIS 1 (zenith angle) is high value default 80, if XAXIS 2 (elevation) is low value default 10. For these 2 types only, the model is evaluated at the two fiducial points and printed along with the model parameters and the difference of the fit at point 2 minus that at point 1.