CENR 55-2 Volume XII OPERATIONAL PROCEDURES FOR GLOBAL SUBSURFACE SYSTEM (GSS) FIELD DATA ACQUISITION (FDA) LOCATIONS 14 November 1986
CENTER REGULATION 55-2 Yolume XI! 14 November 19286 Operations OPERATIONAL PROCEDURES FOR GLOBAL SUBSURFACE SYSTEM (GSS) FIELD DATA ACQUISITION (FDA) LOCATIONS This regulation establishes the procedures for performing standard operations and analysis functions at GSS FDA stations. This regulation is to be used in conjunction with CENR 55-2 Yol I and addresses instructions for the GSS FDA locations only. Instructions to alter any requirements cf this regulation from any source other than Headquarters/DO will not be imple- mented until approved by Headquarters/DOSB. 1. General: a. Oata Channel Oesignator. In order to differentiate the GSS FDA channels from the existing channels, the following changes to the Frequency Response section »f the channel designator system described in Yolume I are required: (1) Short Period. The number 2 will be used at FDA stations using 239Uc 274 7536000 instruments. (2) Long Period. The number 5 will be used at FDA stations using KS36000 instrument(s}. b. Operations Room Environment: (1) The normal operating tolerances are 50-90 degrees Fahrenheit and 10-80% humidity. (2) Should the temperature exceed 90 degrees Fahrenheit or humidity fall below 103%, power the CT down to preclude equipment damage. c. Power. The CT will be operated within specifications contained in TI 2-CT-1. d. Operations Area: (1) No magnet or radio will be brought within 3 feet of the CT at any time. (2) Containers of photographic chemicals will not be piaced on the MOT table. é. Operation Procedures. a. Summation Channel Operations. Individual vertical array channel(s) may be deleted from the STPR, using the Channel Use commands, whenever channel state-of-health is in question, and curing maintenance actions to preclude spurious spikes and/or offsets from affecting the sum- mation. Individual channel(s) will not be deleted from processed traces because of cultura? or wind noise. b. Outages Authorized for Training Purposes. The Specific Station Requirement details each station's authorized training time. An analysis capability must be maintained (i.e., individual high gain vertical, infinite velccity beam } either on site or at the headquarters. If an analysis capability cannot be maintained (i.e. the CT or CPU1 (and CPU2 for high-speed stations) will be inoperative), transmit a request for outage using the criteria established in Volume I, paragraph 2-6. This requirement is to ensure the headquarters fs informed of any impending Joss of data from that station and can approve or disapprove the outage as dictated by mission requirements. 3. Saftware Changes/Contro}. Centralized contro? of all FDA software and supportive documen- tation ts the responsibility of Depot/LG. All procedures for using and maintaining the soft- ware supporting the FDA (CT and RTs) will be provided to the detachment maintenance personnel by Depot/Lé. 4. Recording Procedures: a. Develocorder Timing. In order to nrovide the correct time output to the develocorders (compensating for the CT and RT processing delays) the DATACHRON timers will be retarded 37.001 - seconds from GMT (ZULU). Ho. of Printed Pages: 9 OPR: DOSB Distribution: X
2 CENR 55-2, Yol XII 14 November 1986 dD. Real Time Yisua) Recorder(RTVR). The RTYR will be used for signal monitoring, equip- ment checks and data reporting (by use of the eignt CY analog channels) during periads of deve- locorder or CPUL outages. when used for data reporting, a sensitivity check will be accomplished to verify channel gain. c. Station Processor. The STPR will record all channels supplied by the CT and processed traces on a continuous basis. When CPU] is anticipated to be inoperative in excess of eight hours, and a spare is not available, CPUl and CPU2 wil} be physically interchanged, by main- tenance personnel, to maintain data processing and signal outputs to the develocorders. CPul and CPU2 will not be physically interchanged when CPU2 is inoperative. 5. Calibrations and Operating Tolerances. All data channel calitrations (EQUATE, SSITE, FREQ RESP) will be performed using the CT and the amplitude facter specified in the SSR (for ampli- tude factor to millimicron conversion, reference attachment 1). The STPR will be used for channel sensitivity checks. a. When an array channel must be removed from the STPR input, the Channel Use command will be used, which will automatically adjust the processed data gains to compensate for the removed channel(s). Following maintenance, and after the maintenance personne} have verified the correct operation and tolerance of the channel (CT SSITE cal), add the channel to the STPR with the Channel Use command. Additionally, because the CT automatically equalizes all channels, STPR CGA:NS are not changed from the values entered at configuration (when the initialized operational program js constructed, the CGAIN for each channel is included). b. Develocorder Sensitivity Checks. Develocorder sensitivity checks will be performed on all display channels using the Assign command at CPUL and the values specified in the SSR. c. Calibration Schedule: {1} Each CT channel is required to be calibrated each Wednesday at the time speci fied in the SSR. when a CT calibration with channel analysis (parameter 2 equais SA or EQ) is per- formed, and results are not’ within CT tolerances (i.e., scale factor not replaced), delete the channel from processing (if contributing to a summation) and/or record the channel as unknown (if individual display channel) until maintenance personnel can verify the correct operation of the suspect channel. . (2) Develocorder sensitivity checks will be performed on each display channel during the first and third week of every month. Develocorder sensitivity checks may be performed at a date and time convenient to the location. (3) Frequency responses will be performed, the values normalized, and the results com- pared to established tolerances in January, April, July and October. Frequency responses are not required to be recorded on film. The quarterly or final frequency response MOT printer printouts (analysis results table) will be forwarded in accordance with paragraph 8. d. Unscheduled Checks and Calibrations: (1) Frequency Response - Required whenever components affecting data response curve Characteristics are adjusted or replaced to inciude sensor repair, free period or damping adjustments, and/or RT replacement. (2) SSITE CAL with scale replacement (SA) - Required to determine correct channel operations following maintenance action, and before channel is added to summation traces (for array channels) or determined to be at known gain (for individual channels). (3) Stations will perform unscheduled calibrations whenever channel malfunctions affecting data reliability are suspected. Remove from the STPR, any suspect channels contri- buting to summation traces (for array channels) or record as gain unknown (for individual display channels) until] the channel state-of-health can be verified. @. Station Timing: (1) Stations will use the satellite receiver output for a timing standard (2) The DATACHRON timers will be retarded 37.001 seconds (+/- 0.0005 sec} from ZULU time to compensate for the CT and RT processing delays. 6. Operational Records, Logs, and Reports. All data records, logs, and reports will be main- tained as specified in Volume I with the following exceptions: a. Develocorder Records. The DATA columns will reflect channel gain or status changes. Since all display channels are equalized to nominal gain by the CT, calibration entries need not be annotated on the CEN Form 49. :
CENR 55-2, Vol XLi 14 November 1986 3 dD. Edits. Calibration edits wil! consist of the final SPAL ana the final LPAL/BBAL equate calibrations (merged in chrenlogical order witn the edit requests) for tne first Wednesday of each requested 10 day period. All calibration edits should be tong enough in duration to inciude all channels calibrated for any given calibration (i.e., *ne CT, even for an EQUATE calibration, wili only calibrate one RT at a time. The duration of the calibration edit will De dependent on how many instruments eacn location has). c. Station Logs. In addition to the items specified in Yolume [, al] CT resets and reconfigurations require documentation in the station log. 7. Aralysis Procedures. In addition to the instructions contained in Yolume I, the MMU/SEC value for FDA channels will be computed using the period correction factors in Attachment 2 and 3 of this document. 8. Documentation and Disposition Instructions. MOT printer outputs will be forwarded using the following guide: TYPE QUTPUT FORWARD TO AND CT Configuration Depot/LGEB Retain 1 copy until? next Output cy to HQ/TGX/LGM/DOSB configuration, then destroy Freq Resp Print-out Depot/LGEB Retain 1 copy until next (GET AR Table) cy to HQ/TGX/LGM/DOSB valid frequency response Command and N/A Destroy 3 months after S7TPR Response Data edits have been accomplished 9. Terms and Abbreviations: BBRT - Broadband Remote Terminal CT ~ Central Terminal DOS - Digital Data Subsystem FDA - Field Data Aquisition FSF - Field Site Facility GSS - Slobal Subsurface System LPRT - Long Period Remote Terminal MOT - Maintenance Operating Terminal Msec - Milliseconds RT - Remote Terminal SA - Sine wave generation with CT analysis with scaling factor replacement SI - Sine wave generation, no CT analysis SN - Sine wave generation with CT analysis, no scaling factor replacement SPRT - Short Period Remote Terminal STPR ~ Station Processor OFFICIAL 5 Atch 1. Command Value Conversion Table 2. Normalized Frequency Response Tolerances 3. Period Correction Factors for 23900 and KS36000 Short Period Sensors 4. Long Period System Period Correction Factors 5. GSS STPR Input Sensitivity (INSENSE)
4 CENR $5-2, Vol XII Attachment 1 14 November 1986 COMMAND VALUE CONVERSION TABLE Command Amplitude Calibration Approximate counts Factor Driving Force Expected Blank or lL
CENR 55-2, Vol XII Attachment 2 14 November 1986 5 NORMALIZED FREQUENCY RESPONSE TOLERANCES 1.0547 1.0045 «9543 1.428 Hz -857 Hz 4.0 Hz 1.0642 1.0135 -9628 -02 Hz -025 Hz = =.0333 Hz .04 Hz -O5 Hz -0667 Hz .1 Hz MAX 1.4467 1.4300 1.2516 1.0 -7157 -3229 NOM 1.258 1.300 1.1920 1.0 -6816 2936 MIN 1.0693 1.1700 1.1324 1.0 -6475 -2642
6 CENR 55-2, Yo! XII Attachment 3 14 November 19&€ = Magnification at a given period Magnification ac) Az _ 8 | ef] eS eee ery oe © © e e 6 ° ee ee o eo 6 © 8 @ . ONAN P RPWNNH HHH ODDWCOCCO . o 8 . e OVWNOWANNWNHOOGTOOCCAaArY eo ee ee ew ew er eer er) PMHOr eee . es ee ee NNRPHWDWOWNANWPH-"OWWOAYWMHM SW Ww WQnoe " . . oe eo. OWOODNANRPWNH HOW DNUNADAMRWNM HOW OUMHMH a& WP 0 0 0 0 0 0 0 0 } 1 1 1 1 J 71 1 ] 7} 2 2 2 2 2 2 2 2 2 2 3
CENR 55-2 Vol Xil Attachment 4 14 November 1966 = Magnification at a given period G ° Magnification at 25 SC KS36000 SENSOR cee ee 1200 £1932 5.176 "4705 12 2664 3.754 -3128 13 .3396 2.945 .2265 14 .4128 2.422 .1730 15 .4860 2.058 £1372 16 5524 1.810 .1131 17 .6188 1.616 .0951 18 6852 1.459 .0811 19 .7516 1.330 .0700 20 .8180 1.222 -0611 21 .8544 1.170 .0557 22 .8908 1.123 .0510 .9272 1.079 "0469 .9636 1.038 10432 1.000 1.000 .0400 .9954 1.005 .0386 .9908 1.009 .0374 .9862 1.014 -0362 -9816 1.019 .0351 .9770 1.024 .034] .9600 1.042 .0336 -9430 1.C60 .0331 .9260 1.090 .0327 .9090 1.100 -0324 .8920 1.121 -0320 .8750 1.143 .0317 -8580 1. 166 -0315 .8410 1.189 .0313 .8240 1.214 .0311 .8070 1.239 -0310 -7836 1.276 -0311 -7602 1.315 -0313 .7368 1.357 -0316 7134 1.402 -0319 -6900 1.449 .0322 -6666 1.500 .0326 .6432 1.555 .0331 .6198 - 1.613 .0336 5964 1.677 -0342 -5730 1.745 -0349
8 CENR 55-2, VOL XII Attachment 5 14 November 1986 GSS STPR INPUT SENSITIVITY (ISENSE) DUS ADA N GAIN MU /COUNT mee: SHORT PERIOD (SP) 10.24 0.048 5.12 0.0976 2.56 0.1952 1.28 0.3904 0.64 0.7808 1.5616 0.16 3.1232 6.2464 0.04 12.4928 24.9856 0.01 49.9712 99.9424 LPDARTS PORT (LP) UDS ADA N GAIN MU/COUNT | 9.333 SAMPLE DEV SENS VOLTAGE TABLE: CGAIN = 1.6 1249.3 | 2498.6 | 12492.8
CENR 55-2, VOL XII Attachment 5 14 November 1986 SAMPLE DEV SENS VOLTAGE TABLE: CGAIN = 0.8 DEY GAIN | 2000 ODS: 0