AMIRA TEM file format

AMIRA TEM data file format is specified by ASEG Technical Standards Committee http://www.interpex.com/universalSoundingFormat.PDF.

This format is commonly used to export binary data from TerraTEM, ProTEM, Zonge GDP32, etc.


Sample .tem File

Field Data 
DATATYPE:TEM UNITS:(uV/A) COMPONENT:Z &
LINE:1 ELEV:383 CONFIG:FIXEDLOOP DATE:20151007 RXAREA:400 TXAREA:10000 RXDX:75 SEPACROSS:25
/ Comments: Any line which begins with a forward slash (/) followed by a space
STATION       EAST     NORTH CURRENT   CH1   CH2   CH3   CH4   CH5   CH6    CH7    CH8    CH9   CH10   CH11   CH12   CH13   CH14   CH15   CH16   CH17   CH18   CH19   CH20   CH21   CH22   CH23   CH24   CH25   CH26   CH27   CH28   CH29   CH30   CH31   CH32   CH33   CH34   CH35   CH36   CH37   CH38   CH39   CH40   CH41   CH42   CH43   CH44   CH45   CH46   CH47 
      1    113.761   62.4587      18     *  4810  3634  2551  1785  1268  915.6  671.7  501.4  361.4  252.2  175.3    129  95.61  71.72  56.67  44.06  34.22  25.94  20.33  16.44  13.44  11.56  10.17  8.667  7.111      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      * 
      3   113.7622   62.4579    17.9  7475  6743  4661  3149  2149  1501   1070  774.3  570.9  407.1  279.3  191.2  138.5  100.4  74.36  57.49  44.13  33.18  25.08  20.78  18.04  15.47  13.35  10.73  8.603  6.983  5.196  5.017   4.43  4.374      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      * 
      4 113.762859 62.457143    17.7     *  5859  4589  3284  2311  1631   1162  837.3  611.9  430.9  292.6  199.9  146.3  108.5  82.94  67.23  54.18  43.28  32.77  25.48  20.85  17.23  15.03  13.22  11.24  9.096  8.305  6.949  6.497  6.667      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      * 
      7    113.764   62.4552    18.3     *     *     *     *  2363  2001   1663   1404   1208   1017  806.6    606  479.3  412.6  375.6  334.4  271.6  218.5  195.8  165.9  123.5  104.8  99.56  82.57   71.8  69.13  60.33  58.25  53.01  48.91  45.14  41.58  36.17  28.85     20   21.8  16.23  16.56  14.64  12.95  15.57  11.26  8.689  8.197  7.322  5.421  7.104 
      8   113.7644    62.455    18.6     *     *     *     *  1991  1633   1320   1066  867.7  688.2  531.2    406  322.2  258.1  210.5  178.8  150.5  124.4  101.9  85.81  72.26  61.24  53.66  46.99   41.4  35.59   30.7  28.76  25.32  23.28  21.77  20.16  16.61  14.52  11.88  11.67  9.892  9.247      *      *      *      *      *      *      *      *      * 
      9   113.7642   62.4546    18.6     *     *     *     *  2016  1740   1456   1195  987.6  788.7    614  474.6  382.4  310.7  253.9    216  183.7  152.5    124  104.2  89.62  76.94  67.31  59.09  52.69  46.13  40.22  36.08  31.61  27.96  24.95  23.23      *      *      *      *      *      *      *      *      *      *      *      *      *      *      * 
     10   113.7649    62.454    18.5     *  5350  4694  3574  2659  1965   1480   1104    847  619.5  444.3  313.7  235.8    183  141.9  115.1  93.51  76.49  61.08  49.41  41.35  35.08  30.11  25.14  21.35  17.89  14.43  12.27  10.86  10.22      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      * 
     11   113.7658   62.4539    18.5     *     *  3432  2681  2005  1497   1131  863.2  668.6  502.5    368  268.7  206.5  161.7    127  104.1  84.92  68.16  53.62   42.7  35.14  29.51  25.35  21.68  18.92  16.16  13.51  11.57     10  8.541   7.73  6.378  5.297      *      *      *      *      *      *      *      *      *      *      *      *      *      * 
     12   113.7667   62.4538   17.48     *     *     *  2447  1749  1253    917  689.4  532.4  403.3  301.4  226.8  179.1  143.6  115.1  95.37  78.78  63.79  50.69  40.68  33.41  27.97  24.14  20.54  17.73  14.65  11.33  9.039  7.551  6.693  6.293  5.595  4.548  3.513  2.883  3.078  2.203      *      *      *      *      *      *      *      *      *      * 
     14   113.7685   62.4537    16.4     *     *  4082  2824  1977  1423   1052  797.6  619.5  470.3  351.3  264.1  208.5  166.2  132.8  110.3  90.61  73.35  57.32  45.24  36.89  29.94  25.18  21.34  17.87   14.7  12.01  9.939   8.11  6.707  5.713  4.884  4.183  3.646  2.854  2.067  1.963  1.878      *      *      *      *      *      *      *      *      * 
     15   113.7693   62.4531      16     *     *  3651  2779  2069  1553   1182  914.4  718.8  552.8  415.4  312.2  245.6  194.8  154.9  127.8    104  83.69  64.81  50.75  40.56  32.56  27.25  22.88  19.25  15.81  12.69   10.5   8.75  7.063  5.863  5.169  4.594      4  3.013  2.538      *      *      *      *      *      *      *      *      *      *      * 
     16   113.7701    62.453    16.3     *     *  3542  2645  1961  1472   1121  867.5    681  521.5  389.8    291  227.2  179.6  142.4  116.8  95.34   76.5  59.33  46.69  37.67  30.67  25.77  21.72   18.4  14.79   11.6  9.325  7.791  6.626  5.969  5.313  4.405  3.675  3.123  2.663  2.258      *      *      *      *      *      *      *      *      *      * 
     18   113.7713   62.4533    16.7     *     *  4233  3053  2180  1580   1166    879  673.1  502.3  366.6  266.9  204.5  159.3  124.3  100.9  81.98  65.33  50.84  40.06  32.16  26.17   22.1   18.5  15.39  12.69  10.06  8.263  7.066  6.108   5.12  4.623  4.395  3.611  2.599  1.886  1.521  1.539  1.976   1.76  0.982  0.418  1.006  0.538      *      *      * 


AMIRA .tem keywords recognized by TDEM Geomodel

Parameter Keywords Values
Survey configuration CONFIG, CONFIGURATION, LAYOUT, TYPE, SURVEY_TYPE COINCIDENT, COINCIDENT_LOOP, COINC_L, INLOOP, IN_LOOP, LTX_ILR, CENTRAL, FIXEDLOOP, FIXED_LOOP, FIXED, SLINGRAM, SLNGRM, INOUT, MOVING_LOOP (default = FIXED)
Line number LINE, PROFILE (default = file name)
Station number STATION, READING, SOUNDING, STN, FID, FIDUCIAL (default = 0)
Instrument Used INSTRUMENT, TEMINST, INST
Units of distance measurement UNITS.LENGTH, LENGTH_UNITS M, FT (default = M)
Data units for the EM variable UNITS, UNITS.EMIP uV/A, nV/AM2, uV, pV/Am4, nV, pV, uV/m2, nV, nV/A, nV/Am2, nV/m2, pV, pV/A, pV/Am2, pV/m2 (default = uV/A)
Number of turns in Tx Loop TXTURNS, TURNS (default = 1)
Length of a side of the Tx loop in the X (along line) and Y (across line) direction for rectangular loops LSIDE, LOOPSIDE, TXSIDE
Rx effective loop area RXAREA
Tx loop area TXAREA, LOOPAREA
Centre distance horizontally along line between the transmitter and receiver loops RXDX SEPARATION, SEP
Centre distance horizontally across line between the transmitter and receiver loops SEPACROSS RXDY, SEPARATIONACROSS, SEPACROSS, ASEP
Centre distance vertically between the transmitter and receiver loops VERTSEPARATION RXDZ, SEPARATIONVERT, VSEP
Direction in which EM field is measured COMPONENT, CMP, COMP, C Z (default = Z)
Survey Date as a number in the format YYYYMMDD DATE
Transmitter current CURRENT, CURR, CUR, TXI (default = 1)
Transmitter repetition rate (hertz) FREQ, FREQUENCY, BFREQ, BASEFREQ, F
Transmitter turn-off ramp time (mSec) TURNOFF, RAMP, RMP (default = 0)
Time from the start of Tx turn off to time zero (mSec) INITDELAY, INIT_DELAY, INIT (default = 0)
Reading time as a string in the format YYYYMMDD_HHMMSS.SS DATETIME
Transmitter off time (mSec) OFFTIME
Transmitter on time (mSec) ONTIME, PULSEWIDTH
The easting or Longitude (decimal degrees) X, EAST, EASTING, LONG (default = LINE)
The northing or Longitude (decimal degrees) Y, NORTH, LAT, NRTH, NORTHING (default = STATION)
Easting (X) coordinate specification for the centre of an In-Out survey transmitter loop. TXCENTX
Northing (Y) coordinate specification for the centre of an In-Out survey transmitter loop. TXCENTY
Station height Z, ELEVATION, ELEV, RL (default = 0)
Number of delay times or channels NCH, NUMTIMES

Constant CHANNELFILE is not recognized by TDEM Geomodel


Window times must be specified either using a paired combination of @DELAY and @WIDTH or @TIMESSTART and @TIMESEND as @keywords in the header or by using their non-@ equivalents in the channel file.

Sample .tem file with window times

Field Data 
DATATYPE:TEM UNITS:(uV/A) COMPONENT:Z &
LINE:1 ELEV:383 CONFIG:FIXEDLOOP DATE:20151007 RXAREA:400 TXAREA:10000 RXDX:75 SEPACROSS:25
@DELAY:0.021,0.028,0.037,0.046,0.056,0.065,0.075,0.084,0.093,0.105,0.118,0.132,0.145,0.158,0.172,0.185,0.199,0.216,0.237,0.259,0.28,0.302,0.323,0.344,0.366,0.395,0.433,0.47,0.507,0.545,0.582,0.62,0.657,0.71,0.78,0.849,0.919,0.988,1.057,1.127,1.196,1.298,1.431,1.564,1.698,1.831,1.965
@WIDTH:0.002,0.002,0.002,0.002,0.002,0.002,0.002,0.002,0.003,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.04,0.1,0.1,0.1,0.1,0.1,0.1,0.1,0.1,0.1,0.1,0.1
STATION       EAST     NORTH CURRENT   CH1   CH2   CH3   CH4   CH5   CH6    CH7    CH8    CH9   CH10   CH11   CH12   CH13   CH14   CH15   CH16   CH17   CH18   CH19   CH20   CH21   CH22   CH23   CH24   CH25   CH26   CH27   CH28   CH29   CH30   CH31   CH32   CH33   CH34   CH35   CH36   CH37   CH38   CH39   CH40   CH41   CH42   CH43   CH44   CH45   CH46   CH47 
      1    113.761   62.4587      18     *  4810  3634  2551  1785  1268  915.6  671.7  501.4  361.4  252.2  175.3    129  95.61  71.72  56.67  44.06  34.22  25.94  20.33  16.44  13.44  11.56  10.17  8.667  7.111      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      * 
      3   113.7622   62.4579    17.9  7475  6743  4661  3149  2149  1501   1070  774.3  570.9  407.1  279.3  191.2  138.5  100.4  74.36  57.49  44.13  33.18  25.08  20.78  18.04  15.47  13.35  10.73  8.603  6.983  5.196  5.017   4.43  4.374      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      * 
      4 113.762859 62.457143    17.7     *  5859  4589  3284  2311  1631   1162  837.3  611.9  430.9  292.6  199.9  146.3  108.5  82.94  67.23  54.18  43.28  32.77  25.48  20.85  17.23  15.03  13.22  11.24  9.096  8.305  6.949  6.497  6.667      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      * 
      7    113.764   62.4552    18.3     *     *     *     *  2363  2001   1663   1404   1208   1017  806.6    606  479.3  412.6  375.6  334.4  271.6  218.5  195.8  165.9  123.5  104.8  99.56  82.57   71.8  69.13  60.33  58.25  53.01  48.91  45.14  41.58  36.17  28.85     20   21.8  16.23  16.56  14.64  12.95  15.57  11.26  8.689  8.197  7.322  5.421  7.104 
      8   113.7644    62.455    18.6     *     *     *     *  1991  1633   1320   1066  867.7  688.2  531.2    406  322.2  258.1  210.5  178.8  150.5  124.4  101.9  85.81  72.26  61.24  53.66  46.99   41.4  35.59   30.7  28.76  25.32  23.28  21.77  20.16  16.61  14.52  11.88  11.67  9.892  9.247      *      *      *      *      *      *      *      *      * 
      9   113.7642   62.4546    18.6     *     *     *     *  2016  1740   1456   1195  987.6  788.7    614  474.6  382.4  310.7  253.9    216  183.7  152.5    124  104.2  89.62  76.94  67.31  59.09  52.69  46.13  40.22  36.08  31.61  27.96  24.95  23.23      *      *      *      *      *      *      *      *      *      *      *      *      *      *      * 
     10   113.7649    62.454    18.5     *  5350  4694  3574  2659  1965   1480   1104    847  619.5  444.3  313.7  235.8    183  141.9  115.1  93.51  76.49  61.08  49.41  41.35  35.08  30.11  25.14  21.35  17.89  14.43  12.27  10.86  10.22      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      *      * 
     11   113.7658   62.4539    18.5     *     *  3432  2681  2005  1497   1131  863.2  668.6  502.5    368  268.7  206.5  161.7    127  104.1  84.92  68.16  53.62   42.7  35.14  29.51  25.35  21.68  18.92  16.16  13.51  11.57     10  8.541   7.73  6.378  5.297      *      *      *      *      *      *      *      *      *      *      *      *      *      * 
     12   113.7667   62.4538   17.48     *     *     *  2447  1749  1253    917  689.4  532.4  403.3  301.4  226.8  179.1  143.6  115.1  95.37  78.78  63.79  50.69  40.68  33.41  27.97  24.14  20.54  17.73  14.65  11.33  9.039  7.551  6.693  6.293  5.595  4.548  3.513  2.883  3.078  2.203      *      *      *      *      *      *      *      *      *      * 
     14   113.7685   62.4537    16.4     *     *  4082  2824  1977  1423   1052  797.6  619.5  470.3  351.3  264.1  208.5  166.2  132.8  110.3  90.61  73.35  57.32  45.24  36.89  29.94  25.18  21.34  17.87   14.7  12.01  9.939   8.11  6.707  5.713  4.884  4.183  3.646  2.854  2.067  1.963  1.878      *      *      *      *      *      *      *      *      * 
     15   113.7693   62.4531      16     *     *  3651  2779  2069  1553   1182  914.4  718.8  552.8  415.4  312.2  245.6  194.8  154.9  127.8    104  83.69  64.81  50.75  40.56  32.56  27.25  22.88  19.25  15.81  12.69   10.5   8.75  7.063  5.863  5.169  4.594      4  3.013  2.538      *      *      *      *      *      *      *      *      *      *      * 
     16   113.7701    62.453    16.3     *     *  3542  2645  1961  1472   1121  867.5    681  521.5  389.8    291  227.2  179.6  142.4  116.8  95.34   76.5  59.33  46.69  37.67  30.67  25.77  21.72   18.4  14.79   11.6  9.325  7.791  6.626  5.969  5.313  4.405  3.675  3.123  2.663  2.258      *      *      *      *      *      *      *      *      *      * 
     18   113.7713   62.4533    16.7     *     *  4233  3053  2180  1580   1166    879  673.1  502.3  366.6  266.9  204.5  159.3  124.3  100.9  81.98  65.33  50.84  40.06  32.16  26.17   22.1   18.5  15.39  12.69  10.06  8.263  7.066  6.108   5.12  4.623  4.395  3.611  2.599  1.886  1.521  1.539  1.976   1.76  0.982  0.418  1.006  0.538      *      *      *