! Skeleton table for the "cnofs_vefi_fft_2sec_mode1_00000000_v01.cdf" CDF. ! Generated: Thursday, 14-Mar-2024 11:14:08 ! CDF created/modified by CDF V3.3.1 ! Skeleton table created by CDF V3.8.1_0 #header CDF NAME: cnofs_vefi_fft_2sec_mode1_00000000_v01.cdf DATA ENCODING: NETWORK MAJORITY: ROW FORMAT: SINGLE ! Variables G.Attributes V.Attributes Records Dims Sizes ! --------- ------------ ------------ ------- ---- ----- 0/8 25 24 0/z 0 ! CDF_COMPRESSION: None ! (Valid compression: None, GZIP.1-9, RLE.0, HUFF.0, AHUFF.0) ! CDF_CHECKSUM: None ! (Valid checksum: None, MD5) #GLOBALattributes ! Attribute Entry Data ! Name Number Type Value ! --------- ------ ---- ----- "Project" 1: CDF_CHAR { "CNOFS" } . "Source_name" 1: CDF_CHAR { "CNOFS>Communications " - "Navigation Outage Forecast" - " System" } . "Discipline" 1: CDF_CHAR { "Space Physics>Ionospheric " - "Science" } . "Data_type" 1: CDF_CHAR { "K0>Key Parameter. The " - "data are PRELIMINARY, and " - "as such, are intended for " - "BROWSE PURPOSES ONLY." } . "Descriptor" 1: CDF_CHAR { "VEFI" } . "File_naming_convention" 1: CDF_CHAR { "source_datatype_descriptor" } . "Data_version" 1: CDF_CHAR { "1" } . "PI_name" 1: CDF_CHAR { "Robert F. Pfaff" } . "PI_affiliation" 1: CDF_CHAR { "GSFC" } . "TEXT" 1: CDF_CHAR { "This data file contains " - "information on the FFT " - "data as processed by the " - "VEFI team at NASA/Goddard " - "Space Flight Center. Mode" - " 1 FFT data contains two " - "channels:.1) E34 HF, 8 MHz" - " sampling, 0-4 MHz FFT " - "spectra,.2) E34 LFB, 32 " - "kHz sampling, 0-16 kHz FFT" - " spectra. The FFT spectra" - " are tabulated for 128 bin" - " semi-log spaced " - "frequencies and are " - "presented in units of " - "(milliVolts/meter)^2/Hz. " - "Gain is set to 1 and the " - "FFT window is set to " - "Hanning. E34 LFB channel " - "is boosted, meaning that " - "the gain is 1 at DC while " - "the high frequencies are " - "boosted by a factor of 10 " - "using a 'shelf' filter " - "(1-zero at 0.5 Hz and " - "1-pole at 5 Hz). The data" - " is PRELIMINARY, and as " - "such, is intended for " - "BROWSE PURPOSES ONLY. " - "Registering your email " - "will allow notification of" - " updates." } . "Instrument_type" 1: CDF_CHAR { "Electric Fields (space)" } . "Mission_group" 1: CDF_CHAR { "CNOFS" } . "Logical_source" 1: CDF_CHAR { "cnofs_vefi_fft_2sec_mode1" } . "Logical_file_id" 1: CDF_CHAR { " " } . "Logical_source_description" 1: CDF_CHAR { "FFT data, Mode1 (at 1 " - "spectra every 2 seconds) " - "of the electric field data" - " produced by VEFI on the " - "Communication Navigation " - "Outage Forecast System " - "satellite. The data are " - "PRELIMINARY, and as such, " - "are intended for BROWSE " - "PURPOSES ONLY." } . "Time_resolution" 1: CDF_CHAR { "0.5 seconds" } . "Rules_of_use" 1: CDF_CHAR { "While the VEFI data are " - "still preliminary, users " - "are requested to contact " - "the P.I., Dr. Robert Pfaff" - " at NASA GSFC, prior to " - "publication of any VEFI " - "data." } . "Generated_by" 1: CDF_CHAR { "S. Martin, ADNET Systems " - "Inc. on contract to " - "NASA/GSFC" } . "Generation_date" 1: CDF_CHAR { " " } . "Acknowledgement" 1: CDF_CHAR { "VEFI was designed and " - "built by NASA Goddard " - "Space Flight Center. CNOFS" - " is a joint effort between" - " the Air Force Research " - "Laboratory Space Vehicles " - "Directorate and the USAF " - "Space Test Program." } . "MODS" 1: CDF_CHAR { " " } . "ADID_ref" . "LINK_TEXT" 1: CDF_CHAR { "Please see our " } . "LINK_TITLE" 1: CDF_CHAR { "VEFI Project home page at " - "NASA Goddard Space Flight " - "Center" } . "HTTP_LINK" 1: CDF_CHAR { "http://vefi.gsfc.nasa.gov/" } . #VARIABLEattributes "CATDESC" "DEPEND_0" "DEPEND_1" "DEPEND_2" "DEPEND_3" "DICT_KEY" "DISPLAY_TYPE" "FIELDNAM" "FILLVAL" "FORMAT" "LABLAXIS" "LABL_PTR_1" "LABL_PTR_2" "LABL_PTR_3" "UNITS" "UNIT_PTR" "VALIDMIN" "VALIDMAX" "VAR_TYPE" "SCALETYP" "SCAL_PTR" "VAR_NOTES" "MONOTON" "FORM_PTR" #variables ! No rVariables. #zVariables ! Variable Data Number Record Dimension ! Name Type Elements Dims Sizes Variance Variances ! -------- ---- -------- ---- ----- -------- --------- "Epoch" CDF_EPOCH 1 0 T ! VAR_COMPRESSION: None ! (Valid compression: None, GZIP.1-9, RLE.0, HUFF.0, AHUFF.0) ! VAR_SPARSERECORDS: None ! (Valid sparserecords: None, sRecords.PAD, sRecords.PREV) ! VAR_PADVALUE: 01-Jan-0000 00:00:00.000 ! Attribute Data ! Name Type Value ! -------- ---- ----- "CATDESC" CDF_CHAR { "Default time" } "FIELDNAM" CDF_CHAR { "Epoch" } "FILLVAL" CDF_EPOCH { 31-Dec-9999 23:59:59.999 } "LABLAXIS" CDF_CHAR { "Epoch" } "VALIDMIN" CDF_EPOCH { 01-Jan-1990 00:00:00.000 } "VALIDMAX" CDF_EPOCH { 31-Dec-2029 23:59:59.999 } "VAR_TYPE" CDF_CHAR { "support_data" } "SCALETYP" CDF_CHAR { "linear" } "MONOTON" CDF_CHAR { "INCREASE" } . ! RV values were not requested. ! Variable Data Number Record Dimension ! Name Type Elements Dims Sizes Variance Variances ! -------- ---- -------- ---- ----- -------- --------- "year" CDF_UINT2 1 0 F ! VAR_COMPRESSION: None ! (Valid compression: None, GZIP.1-9, RLE.0, HUFF.0, AHUFF.0) ! VAR_SPARSERECORDS: None ! (Valid sparserecords: None, sRecords.PAD, sRecords.PREV) ! VAR_PADVALUE: 0 ! Attribute Data ! Name Type Value ! -------- ---- ----- "CATDESC" CDF_CHAR { "year for this data file" } "FIELDNAM" CDF_CHAR { "year" } "FILLVAL" CDF_UINT2 { 65535 } "FORMAT" CDF_CHAR { "I4" } "VALIDMIN" CDF_UINT2 { 2008 } "VALIDMAX" CDF_UINT2 { 2028 } "VAR_TYPE" CDF_CHAR { "support_data" } "SCALETYP" CDF_CHAR { "linear" } . ! NRV values follow... [] = 2010 ! Variable Data Number Record Dimension ! Name Type Elements Dims Sizes Variance Variances ! -------- ---- -------- ---- ----- -------- --------- "dayofyear" CDF_UINT2 1 0 F ! VAR_COMPRESSION: None ! (Valid compression: None, GZIP.1-9, RLE.0, HUFF.0, AHUFF.0) ! VAR_SPARSERECORDS: None ! (Valid sparserecords: None, sRecords.PAD, sRecords.PREV) ! VAR_PADVALUE: 0 ! Attribute Data ! Name Type Value ! -------- ---- ----- "CATDESC" CDF_CHAR { "The day number (Jan 1 = day 1) for " - "this data file." } "FIELDNAM" CDF_CHAR { "dayofyear" } "FILLVAL" CDF_UINT2 { 65535 } "FORMAT" CDF_CHAR { "I5" } "LABLAXIS" CDF_CHAR { "Day of Year" } "VALIDMIN" CDF_UINT2 { 1 } "VALIDMAX" CDF_UINT2 { 366 } "VAR_TYPE" CDF_CHAR { "support_data" } "SCALETYP" CDF_CHAR { "linear" } . ! NRV values follow... [] = 184 ! Variable Data Number Record Dimension ! Name Type Elements Dims Sizes Variance Variances ! -------- ---- -------- ---- ----- -------- --------- "FFT_E34HF" CDF_REAL4 1 1 128 T T ! VAR_COMPRESSION: None ! (Valid compression: None, GZIP.1-9, RLE.0, HUFF.0, AHUFF.0) ! VAR_SPARSERECORDS: None ! (Valid sparserecords: None, sRecords.PAD, sRecords.PREV) ! VAR_PADVALUE: 0.0 ! Attribute Data ! Name Type Value ! -------- ---- ----- "CATDESC" CDF_CHAR { "Electric Field FFT (E34HF), 0-4 MHz, 8" - " MHz sampling" } "DEPEND_0" CDF_CHAR { "Epoch" } "DEPEND_1" CDF_CHAR { "FFT_E34HF_FREQ" } "DISPLAY_TYPE" CDF_CHAR { "spectrogram" } "FIELDNAM" CDF_CHAR { "FFT E34HF" } "FILLVAL" CDF_REAL4 { -1.0e+31 } "FORMAT" CDF_CHAR { "E9.3" } "LABLAXIS" CDF_CHAR { "FFT E34HF Power" } "UNITS" CDF_CHAR { "(mV/m)^2/Hz" } "VALIDMIN" CDF_REAL4 { 1.000e-15 } "VALIDMAX" CDF_REAL4 { 1.000e-01 } "VAR_TYPE" CDF_CHAR { "data" } "SCALETYP" CDF_CHAR { "log" } "VAR_NOTES" CDF_CHAR { "E34 HF, 8 MHz sampling, 1024 point " - "FFTs. Gain is set to 1 and the FFT " - "window is set to a modified Hanning " - "(first 256 samples processed with a " - "Hanning window, middle 512 samples no " - "window processing, last 256 sample " - "processed with a reverse index Hanning" - " window). To get a duty cycle of 1 " - "FFT every 2 seconds, 16 1024 point " - "FFTs at 1 Hz are averaged together." } . ! RV values were not requested. ! Variable Data Number Record Dimension ! Name Type Elements Dims Sizes Variance Variances ! -------- ---- -------- ---- ----- -------- --------- "FFT_E34HF_FREQ" CDF_REAL4 1 1 128 F T ! VAR_COMPRESSION: None ! (Valid compression: None, GZIP.1-9, RLE.0, HUFF.0, AHUFF.0) ! VAR_SPARSERECORDS: None ! (Valid sparserecords: None, sRecords.PAD, sRecords.PREV) ! VAR_PADVALUE: 0.0 ! Attribute Data ! Name Type Value ! -------- ---- ----- "CATDESC" CDF_CHAR { "Frequencies for E34HF FFT." } "FIELDNAM" CDF_CHAR { "FFT E34HF Freq" } "FILLVAL" CDF_REAL4 { -1.0e+31 } "FORMAT" CDF_CHAR { "f5.3" } "LABLAXIS" CDF_CHAR { "FFT E34HF FREQ" } "UNITS" CDF_CHAR { "MHz" } "VALIDMIN" CDF_REAL4 { 0.000 } "VALIDMAX" CDF_REAL4 { 4.000 } "VAR_TYPE" CDF_CHAR { "support_data" } "SCALETYP" CDF_CHAR { "linear" } "VAR_NOTES" CDF_CHAR { "semi-log spaced frequencies between 0 " - "and 4 MHz." } . ! NRV values follow... [1] = 0.008 [2] = 0.016 [3] = 0.023 [4] = 0.031 [5] = 0.039 [6] = 0.047 [7] = 0.055 [8] = 0.062 [9] = 0.070 [10] = 0.078 [11] = 0.086 [12] = 0.094 [13] = 0.102 [14] = 0.109 [15] = 0.117 [16] = 0.125 [17] = 0.133 [18] = 0.141 [19] = 0.148 [20] = 0.156 [21] = 0.164 [22] = 0.172 [23] = 0.180 [24] = 0.188 [25] = 0.195 [26] = 0.203 [27] = 0.211 [28] = 0.219 [29] = 0.227 [30] = 0.234 [31] = 0.242 [32] = 0.250 [33] = 0.258 [34] = 0.266 [35] = 0.273 [36] = 0.281 [37] = 0.289 [38] = 0.297 [39] = 0.305 [40] = 0.312 [41] = 0.320 [42] = 0.328 [43] = 0.336 [44] = 0.344 [45] = 0.352 [46] = 0.359 [47] = 0.367 [48] = 0.375 [49] = 0.383 [50] = 0.391 [51] = 0.398 [52] = 0.406 [53] = 0.414 [54] = 0.422 [55] = 0.430 [56] = 0.438 [57] = 0.445 [58] = 0.453 [59] = 0.461 [60] = 0.469 [61] = 0.477 [62] = 0.484 [63] = 0.492 [64] = 0.500 [65] = 0.508 [66] = 0.516 [67] = 0.523 [68] = 0.531 [69] = 0.539 [70] = 0.547 [71] = 0.555 [72] = 0.562 [73] = 0.570 [74] = 0.578 [75] = 0.586 [76] = 0.594 [77] = 0.602 [78] = 0.609 [79] = 0.617 [80] = 0.625 [81] = 0.633 [82] = 0.641 [83] = 0.648 [84] = 0.656 [85] = 0.664 [86] = 0.672 [87] = 0.680 [88] = 0.688 [89] = 0.695 [90] = 0.703 [91] = 0.711 [92] = 0.719 [93] = 0.727 [94] = 0.766 [95] = 0.805 [96] = 0.844 [97] = 0.883 [98] = 0.930 [99] = 0.977 [100] = 1.023 [101] = 1.070 [102] = 1.125 [103] = 1.180 [104] = 1.234 [105] = 1.305 [106] = 1.367 [107] = 1.438 [108] = 1.508 [109] = 1.586 [110] = 1.664 [111] = 1.750 [112] = 1.836 [113] = 1.922 [114] = 2.023 [115] = 2.125 [116] = 2.227 [117] = 2.344 [118] = 2.453 [119] = 2.578 [120] = 2.711 [121] = 2.844 [122] = 2.984 [123] = 3.133 [124] = 3.289 [125] = 3.453 [126] = 3.625 [127] = 3.812 [128] = 3.992 ! Variable Data Number Record Dimension ! Name Type Elements Dims Sizes Variance Variances ! -------- ---- -------- ---- ----- -------- --------- "FFT_E34LFB" CDF_REAL4 1 1 128 T T ! VAR_COMPRESSION: None ! (Valid compression: None, GZIP.1-9, RLE.0, HUFF.0, AHUFF.0) ! VAR_SPARSERECORDS: None ! (Valid sparserecords: None, sRecords.PAD, sRecords.PREV) ! VAR_PADVALUE: 0.0 ! Attribute Data ! Name Type Value ! -------- ---- ----- "CATDESC" CDF_CHAR { "Electric Field FFT (E34LFB), 0-16 kHz," - " 32 kHz sampling" } "DEPEND_0" CDF_CHAR { "Epoch" } "DEPEND_1" CDF_CHAR { "FFT_E34LFB_FREQ" } "DISPLAY_TYPE" CDF_CHAR { "spectrogram" } "FIELDNAM" CDF_CHAR { "FFT E34LFB" } "FILLVAL" CDF_REAL4 { -1.0e+31 } "FORMAT" CDF_CHAR { "E9.3" } "LABLAXIS" CDF_CHAR { "FFT Power" } "UNITS" CDF_CHAR { "(mV/m)^2/Hz" } "VALIDMIN" CDF_REAL4 { 1.000e-15 } "VALIDMAX" CDF_REAL4 { 1.000e-01 } "VAR_TYPE" CDF_CHAR { "data" } "SCALETYP" CDF_CHAR { "log" } "VAR_NOTES" CDF_CHAR { "E34 LFB, 32 kHz sampling, 1024 point " - "FFTs. Gain is set to 1 and the FFT " - "window is set to a modified Hanning " - "(first 256 samples processed with a " - "Hanning window, middle 512 samples no " - "window processing, last 256 sample " - "processed with a reverse index Hanning" - " window). E34 LFB channel is boosted," - " meaning that the gain is 1 at DC " - "while the high frequencies are boosted" - " by a factor of 10 using a 'shelf' " - "filter (1-zero at 0.5 Hz and 1-pole at" - " 5 Hz). To get a duty cycle of 1 FFT " - "every 2 seconds, 16 1024 point FFTs at" - " 1 Hz are averaged together." } . ! RV values were not requested. ! Variable Data Number Record Dimension ! Name Type Elements Dims Sizes Variance Variances ! -------- ---- -------- ---- ----- -------- --------- "FFT_E34LFB_FREQ" CDF_REAL4 1 1 128 F T ! VAR_COMPRESSION: None ! (Valid compression: None, GZIP.1-9, RLE.0, HUFF.0, AHUFF.0) ! VAR_SPARSERECORDS: None ! (Valid sparserecords: None, sRecords.PAD, sRecords.PREV) ! VAR_PADVALUE: 0.0 ! Attribute Data ! Name Type Value ! -------- ---- ----- "CATDESC" CDF_CHAR { "Frequencies for E34LFB FFT" } "FIELDNAM" CDF_CHAR { "FFT E34LFB Freq" } "FILLVAL" CDF_REAL4 { -1.0e+31 } "FORMAT" CDF_CHAR { "f6.3" } "LABLAXIS" CDF_CHAR { "FFT E34LFB FREQ" } "UNITS" CDF_CHAR { "kHz" } "VALIDMIN" CDF_REAL4 { 0.000 } "VALIDMAX" CDF_REAL4 { 17.000 } "VAR_TYPE" CDF_CHAR { "support_data" } "SCALETYP" CDF_CHAR { "linear" } "VAR_NOTES" CDF_CHAR { "semi-log spaced frequencies between 0 " - "and 16 kHz." } . ! NRV values follow... [1] = 0.032 [2] = 0.064 [3] = 0.095 [4] = 0.127 [5] = 0.159 [6] = 0.191 [7] = 0.222 [8] = 0.254 [9] = 0.286 [10] = 0.318 [11] = 0.349 [12] = 0.381 [13] = 0.413 [14] = 0.445 [15] = 0.476 [16] = 0.508 [17] = 0.540 [18] = 0.572 [19] = 0.603 [20] = 0.635 [21] = 0.667 [22] = 0.699 [23] = 0.730 [24] = 0.762 [25] = 0.794 [26] = 0.826 [27] = 0.857 [28] = 0.889 [29] = 0.921 [30] = 0.953 [31] = 0.985 [32] = 1.016 [33] = 1.048 [34] = 1.080 [35] = 1.112 [36] = 1.143 [37] = 1.175 [38] = 1.207 [39] = 1.239 [40] = 1.270 [41] = 1.302 [42] = 1.334 [43] = 1.366 [44] = 1.397 [45] = 1.429 [46] = 1.461 [47] = 1.493 [48] = 1.524 [49] = 1.556 [50] = 1.588 [51] = 1.620 [52] = 1.651 [53] = 1.683 [54] = 1.715 [55] = 1.747 [56] = 1.778 [57] = 1.810 [58] = 1.842 [59] = 1.874 [60] = 1.905 [61] = 1.937 [62] = 1.969 [63] = 2.001 [64] = 2.033 [65] = 2.064 [66] = 2.096 [67] = 2.128 [68] = 2.160 [69] = 2.191 [70] = 2.223 [71] = 2.255 [72] = 2.287 [73] = 2.318 [74] = 2.350 [75] = 2.382 [76] = 2.414 [77] = 2.445 [78] = 2.477 [79] = 2.509 [80] = 2.541 [81] = 2.572 [82] = 2.604 [83] = 2.636 [84] = 2.668 [85] = 2.699 [86] = 2.731 [87] = 2.763 [88] = 2.795 [89] = 2.826 [90] = 2.858 [91] = 2.890 [92] = 2.922 [93] = 2.954 [94] = 3.112 [95] = 3.271 [96] = 3.430 [97] = 3.589 [98] = 3.779 [99] = 3.970 [100] = 4.160 [101] = 4.351 [102] = 4.573 [103] = 4.795 [104] = 5.018 [105] = 5.304 [106] = 5.558 [107] = 5.843 [108] = 6.129 [109] = 6.447 [110] = 6.764 [111] = 7.114 [112] = 7.463 [113] = 7.812 [114] = 8.225 [115] = 8.638 [116] = 9.051 [117] = 9.527 [118] = 9.972 [119] = 10.480 [120] = 11.020 [121] = 11.560 [122] = 12.132 [123] = 12.735 [124] = 13.370 [125] = 14.037 [126] = 14.736 [127] = 15.498 [128] = 16.228 ! Variable Data Number Record Dimension ! Name Type Elements Dims Sizes Variance Variances ! -------- ---- -------- ---- ----- -------- --------- "FFT_quality" CDF_UINT2 1 0 T ! VAR_COMPRESSION: None ! (Valid compression: None, GZIP.1-9, RLE.0, HUFF.0, AHUFF.0) ! VAR_SPARSERECORDS: None ! (Valid sparserecords: None, sRecords.PAD, sRecords.PREV) ! VAR_PADVALUE: 0 ! Attribute Data ! Name Type Value ! -------- ---- ----- "CATDESC" CDF_CHAR { "Parameters used for the FFTs." } "DEPEND_0" CDF_CHAR { "Epoch" } "FIELDNAM" CDF_CHAR { "FFT_quality" } "FILLVAL" CDF_UINT2 { 65535 } "FORMAT" CDF_CHAR { "I5" } "LABLAXIS" CDF_CHAR { "FFT_quality" } "VALIDMIN" CDF_UINT2 { 0 } "VALIDMAX" CDF_UINT2 { 65535 } "VAR_TYPE" CDF_CHAR { "support_data" } "SCALETYP" CDF_CHAR { "linear" } "VAR_NOTES" CDF_CHAR { "bit 0-7: FFT Gain , bit 8: Active Gain" - " enabled, bit 9: High pass filter with" - " 3db cutoff at 0.0016*samplerate, bit " - "10: High pass filter with 3db cutoff " - "at 0.0005*samplerate, bit 11: a " - "non-rectangular window was applied to " - "the time domain, bit 12: Ensemble " - "Averaging was enabled, bit 13: " - "Log-spaced frequency bins, bit 14: FFT" - " ready, bit 15: FFT overflow. FFT " - "gain definition: bit 0-7 correspond to" - " a gain of 1/16, 1/8, 1/4, 1/2, 1, 2, " - "4, 8 respectively." } . ! RV values were not requested. #end