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Campbell TGT1 Operator's Manual

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TGT1 GOES TRANSMITTER
OPERATOR'S MANUAL
REVISION: 3/03
COPYRIGHT (c) 1995-2003 CAMPBELL SCIENTIFIC, INC.

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  • Page 1 TGT1 GOES TRANSMITTER OPERATOR’S MANUAL REVISION: 3/03 COPYRIGHT (c) 1995-2003 CAMPBELL SCIENTIFIC, INC.
  • Page 2 This is a blank page.
  • Page 3 8132-04. Check *B mode for operating system version. If you did not purchase the TGT-1 and datalogger together, make sure you have the latest operating system. Contact a Campbell Scientific Applications Engineer if you have any questions. The datalogger clock must be set to Coordinated Universal Time. All references to time are based on Coordinated Universal Time.
  • Page 4 This is a blank page.
  • Page 5 CAMPBELL SCIENTIFIC, INC. CAMPBELL SCIENTIFIC, INC. will return such products by surface carrier prepaid. This warranty shall not apply to any CAMPBELL SCIENTIFIC, INC. products which have been subjected to modification, misuse, neglect, accidents of nature, or shipping damage. This warranty is in lieu of all other warranties, expressed or implied, including warranties of merchantability or fitness for a particular purpose.
  • Page 6 This is a blank page.

  • Page 7: Table Of Contents

    TGT1 GOES Transmitter Table of Contents 1. Introduction..............1 2. GOES System..............1 2.1 Orbit......................1 2.2 NESDIS and TransmitWindows ............1 2.3 Data Retrieval ...................1 3. Specifications .............2 4. Required Equipment...........3 4.1 Computer Base Station ................3 4.2 Field Station....................3 5. Power Supplies ............5 5.1 12 and 24 AHr Sealed Rechargeable Batteries .........5...
  • Page 8 TGT1 GOES Transmitter Table of Contents 9.3 21X......................21 9.3.1 Instruction 99................21 9.3.2 Datalogger Programming Theory ..........22 Appendices A. Information on Eligibility and Getting onto the GOES System ............A-1 A.1 Eligibility..................... A-1 A.2 Acquiring Permission ................A-1 B.
  • Page 9 I. Changing the 21X’s RAM or PROM Chips....I-1 I.1 Disassembly of 21X................I-1 I.2 Installing New RAM Chips ..............I-2 I.3 Changing PROM Chips ................I-2 J. Telonics Model TGT1 GOES Certification by NOAA/NESDIA...............J-1 K. High Resolution 18-Bit Binary Format....K-1 Figures 2-1 Data Retrieval Diagram ................2...

  • Page 10: Tgt1 Goes Transmitter Table Of Contents

    TGT1 GOES Transmitter Table of Contents This is a blank page.

  • Page 11: Introduction

    TGT-1. 2.3 Data Retrieval Data retrieval via the TGT1 and the GOES system is illustrated in Figure 2-1. The User Interface Manual, provided by NOAA/ NESDIS, describes the process of retrieving the data from the NESDIS ground station. The data are in the form of 3-byte ASCII (see Appendix B for a computer program that converts the data to decimal).

  • Page 12: Specifications

    TGT1 GOES Transmitter NESDIS ground station via the DOMSAT satellite downlink. DOMSAT is only practical for organizations with many GOES users; contact NESDIS for more information (see Appendix A). NESDIS Wallops Station, VA ground station has Field Station 10 asynchronous...

  • Page 13: Required Equipment

    CR10X, CR10, or CR500. The CR10 and 21X require a special PROM. When using a 21X with both a TGT1 and a storage module (SM192, SM716, or CSM1), hardware and datalogger programming modifications are required. Contact a Campbell Scientific applications engineer for more information.
  • Page 14 TGT1 GOES Transmitter DIFF AG H L AG H L AG H L AG E3 AG G G G G G 12V SERIAL I/O 9 10 SWITCHED 12V 12V POWER CAMPBELL CR10 SCIENTIFIC INC. WIRING PANEL NO. MADE IN USA...

  • Page 15: Power Supplies

    (e.g., SDM devices) might require AC power or a user-supplied deep-cycle rechargeable battery that is trickle-charged with an MSX20R solar panel. Campbell Scientific's power supply brochure and application note provide information about determining your system's power requirements.

  • Page 16: Battery

    (Ground) Red connects to CH12R +12 Terminal 9-Pin connector connects to datalogger I/O port Antenna Cable BNC male connector connects to TGT1 BNC female port Red Cable Connects to CH12R +12 and datalogger 12 V Black Cable Connects to CH12R...

  • Page 17: Antenna Mounting Hardware, Exploded View

    TGT1 GOES Transmitter FIGURE 6.3-1. Antenna Mounting Hardware, Exploded View Fits onto the 1.5" OD pipe FIGURE 6.3-2. Antenna Mounting Hardware, Assembled View 1...
  • Page 18 TGT1 GOES Transmitter Fits onto the 1.5" OD pipe FIGURE 6.3-3. Antenna Mounting Hardware, Assembled View 2...

  • Page 19: Forward And Reflected Power

    TGT1 GOES Transmitter GOES SATELLITE DATA COLLECTION PLATFORM ANTENNA 36 (Elevation Angle) S (180 ) 213 (Azimuth Angle) (270 ) (90 ) (360 ) EXAMPLE ORIENTATION FIGURE 6.3-4. Example Antenna Orientation Diagram 7. Forward and Reflected Power Forward and reflected power are measured (in decimal units) and updated during each transmission (see Sections 8 and 9).

  • Page 20: Programming The Transmitter

    TGT1 GOES Transmitter When the percentage of power reflected is greater or equal to 5, one or more of the following situations exist and must be corrected: • The antenna is not connected. • The antenna is too close to metal.
  • Page 21 TGT1 GOES Transmitter TABLE 8.2-1 *# Parameter's Descriptions Parameter Description 1 - 3 Set the transmitter's clock. All scheduled operations are refer- enced to this clock. Because timing is critical, it must be set to Coordinated Universal Time (CUT). CUT can be obtained by calling the WWV or WWVH time services (call (303) 499-7111 for WWV time and (808) 335-4363 for WWVH).

  • Page 22: Status Information And Test Transmissions

    There are two error messages. The E101 message appears after the user types *# and indicates the transmitter is not communicating with the datalogger (i.e., TGT1 is not powered, SC925G cable is not connected or the storage module is blocking communication. See warnings on first page.). E102 appears after a...

  • Page 23: Programming The Datalogger

    TGT1 GOES Transmitter TABLE 8.3-1 *#60 Commands Command Number Description Displays the current TGT-1 time; hours, minutes, and seconds are the parameters. The TGT-1 time is retrieved when the “A” key is pressed. The amount of time until the next transmission of the active buffer;...

  • Page 24: Datalogger Programming Theory

    Set Output Flag 0 high (10) based on condition 1 Output Processing Instructions P120 Data transfer to TGT1 or P124 Fire weather data transfer to TGT1 Set Output Flag 0 high (10) based on condition n (n = 1,2, . . . )
  • Page 25 TGT1 GOES Transmitter With the following structure, ONLY the last output is sent to the TGT1: Set Output Flag 0 high (10) Output Processing Instructions Set Output Flag 0 high (10) Output Processing Instructions P120 Data Transfer to TGT1 P120 Data Transfer to TGT1 Table 9.1-2 illustrates the correct programming structure.
  • Page 26 Interval (same units as above) 3: 30 Then Do ;Transfer datalogger's final storage data to the TGT1, read the transmitter's latest forward and reflected power readings, and place the results in two sequential input locations. 09: Data Transfer to GOES (P120)
  • Page 27 18: End (P95) Fire Weather-Data Transfer to the TGT1 Use instruction 124 in the place of instruction 120 to send data to the TGT1 using the RAWS Fire Weather format. Data in the RAWS Fire Weather format can be directly loaded into WIMMS. P124 is better at clearing the random buffer to turn off random transmission.
  • Page 28 TGT1 GOES Transmitter The data is formatted as follows: Data Point Description Units Format Hourly total rainfall inches xx.xx Hourly average wind speed Hourly vector average wind direction degrees Sample air temperature Deg. F Hourly average RH percent Hourly average fuel stick temp.

  • Page 29: Program Instruction 123 - Tgt-1 Auto Setup

    TGT1 GOES Transmitter 9.2 Program Instruction 123 - TGT-1 Auto Setup 9.2.1 Functional Description The program instruction P123 is used for automatic setup of the TGT-1. This instruction is used in place of the Star Pound Mode (*#). P123 will transfer all the information needed to properly transmit data via the TGT-1 satellite transmitter.
  • Page 30 TGT1 GOES Transmitter TABLE 9.2-1. P123 Parameter Descriptions Parameter Number Description 1 - 8 The NESDIS-assigned address. Convert the letters in the address to their decimal equivalent (Table 8.2-2). Each digit of the address is placed in one parameter. NESDIS-assigned self-timed uplink channel (see Appendix E channel/ frequency correlation).

  • Page 31: Instruction 99

    The 21X's Instruction 99 is the same as the CR10’s Instruction 99, except there is an extra parameter that specifies the array of data that is transferred to the TGT1 buffer. Instruction 99 also automatically compares the datalogger and transmitter's clocks. If the clocks differ more than 3 seconds, the datalogger's clock is set to the transmitter's.

  • Page 32: Datalogger Programming Theory

    Set Output Flag 0 high (10) based on condition n (n = 1,2, . . . ) Output Processing Instructions P99 Data Transfer to TGT1 With the following structure, ONLY the last output is sent to the TGT1: Set output Flag 0 high (10) Output Processing Instructions...
  • Page 33 TGT1 GOES Transmitter TABLE 9.3-2 21X Example Program This 21X program measures the battery voltage, performs a thermocouple measurement, and transfers an array of data to the TGT1's self-timed buffer. Use a conditional statement (i.e., Instruction 92) to transfer data NOTE only when there is an output to final storage.
  • Page 34 Minute Interval 3: 30 Then Do ;Transfer data array ID 111 to the TGT1's self-timed buffer and places the transmitter's latest forward and reflected power readings into Input Locations 4 and 5. 10: Data Transfer to GOES (P99) 1: 00...
  • Page 35 TGT1 GOES Transmitter ;Sends data to the TGT1 every day 18: If time is (P92) 1: 5 Minutes into a 2: 1440 Minute Interval 3: 30 Then Do 19: Data Transfer to GOES (P99) 1: 00 Buffer Selection 2: 4...
  • Page 36 TGT1 GOES Transmitter This is a blank page.

  • Page 37: Information On Eligibility And Getting Onto The Goes System

    The TGT1 transmits at 100 baud. No new 100 baud channel assignments are being given out by NESDIS so the TGT1 can only be used to fill or replace existing 100 baud channel assignments. For further information link to the following: http://noaasis.noaa.gov/DCS/index.html...
  • Page 38 This is a blank page.
  • Page 39 Appendix B. Data Conversion Computer Program (written in basic) REM THIS PROGRAM CONVERTS 3-BYTE ASCII DATA INTO DECIMAL INPUT "RECEIVE FILE?", RF$ OPEN RF$ FOR OUTPUT AS #2 INPUT "NAME OF FILE CONTAINING GOES DATA"; NFL$ DIM DV$(200) WIDTH "LPT1:", 120 OPEN NFL$ FOR INPUT AS #1 WHILE NOT EOF(1) LINE INPUT #1, A$...
  • Page 40 This is a blank page.

  • Page 41: Antenna Orientation Computer Program

    Appendix C. Antenna Orientation Computer Program (written in basic) 5 REM THIS PROGRAM CALCULATES THE AZIMUTH AND ELEVATION FOR AN 6 REM ANTENNA USED WITH A DCP FOR GOES SATELLITE COMMUNICATIONS 10 CLS : CLEAR 1000 20 INPUT "SATELLITE LONGITUDE (DDD.DD)"; SO 30 INPUT "ANTENNA LONGITUDE (DDD.DD)";...
  • Page 42 This is a blank page.

  • Page 43: Detailed Forward/Reflected Power Information

    Appendix D. Detailed Forward/Reflected Power Information D.1 Impedance Matching The reflected power to forward power ratio shows the degree of impedance match between the transmitter and the cable/antenna assembly. The percent of power reflected approximates the impedance match with the following equation: % power reflected = [((ref + 17.4)/(fwd + 17.4)) x 100] - 1...

  • Page 44: Impedance Match Datalogger Program

    Appendix D. Detailed Forward/Reflected Power Information Table D.2-1. P Values (dBm) +35.9 +37.2 +38.3 +39.0 +39.5 +39.9 +40.4 +40.8 +41.1 +41.7 +42.4 D.3 Impedance Match Datalogger Program D.3.1 CR10X and CR10 This example calculates the percent of power reflected and the amount of power going out to the transmitter if the percent of power reflected is less than *Table 1 Program 01: 10.0...
  • Page 45 Appendix D. Detailed Forward/Reflected Power Information 05: Z=X*F (P37) 1: 10 X Loc [ Scratch1 ] 2: 100 3: 10 Z Loc [ Scratch1 ] 06: Z=X+F (P34) 1: 10 X Loc [ Scratch1 ] 2: -1 3: 7 Z Loc [ PerRef ] ;Calculate the amount of forward power going out to the transmitter if the % reflected is less than 5.
  • Page 46 21: Sample (P70) 1: 2 Reps 2: 6 Loc [ dBmFwd ] ;Transfer data to the TGT1 when Output Flag is set High (10). 22: Data Transfer to GOES (P120) 1: 00 self-timed buffer/append new data to old data 2: 4 FWD/Ref Power Loc [ FwdPwr ] D.3.2 21X...

  • Page 47: Channel/Frequency Correlation

    Appendix E. Channel/Frequency Correlation Channel Frequency (MHz) Channel Frequency 401.7010 401.7745 401.7025 401.7760 401.7040 401.7775 401.7055 401.7790 401.7070 401.7805 401.7085 401.7820 401.7100 401.7835 401.7115 401.7850 401.7130 401.7865 401.7145 401.7880 401.7160 401.7895 401.7175 401.7910 401.7190 401.7925 401.7205 401.7940 401.7220 401.7955 401.7235 401.7970 401.7250 401.7985...
  • Page 48 Appendix E. Channel/Frequency Correlation 401.8495 401.9245 401.8510 401.9260 401.8525 401.9275 401.8540 401.9290 401.8555 401.9305 401.8570 401.9320 401.8585 401.9335 401.8600 401.9350 401.8615 401.9365 401.8630 401.9380 401.8645 401.9395 401.8660 401.9410 401.8675 401.9425 401.8690 401.9440 401.8705 401.9455 401.8720 401.9470 401.8735 401.9485 401.8750 401.9500 401.8765 401.9515 401.8780...

  • Page 49: Data Dump Datalogger Program

    CAUTION transmitter will be damaged. To cause the TGT1 to transmit, use *#60 command 8. The transmission will last less than 5 seconds. To verify transmission occurred, check forward and reflected power (*#60 command 3). The TGT-1 will not perform a test transmission more often than once each minute.

  • Page 50: Cr10X Data Dump Program

    Appendix F. Data Dump Datalogger Program After waiting twenty seconds, set the scan rate to 0 and check the buffer with *#60 commands 7 and 5. If a number other than 0000 is displayed, the steps for setting user FLAG 2 HIGH must be repeated. F.6 CR10X Data Dump Program *Table 1 Program 01: 10.0...

  • Page 51: Local Magnetic Declination

    Appendix G. Local Magnetic Declination G.1 Determining True North Orientation of the antenna is done after the location of True North has been found. Establish a reference point on the horizon for True North (or other direction relative to True North). True North is usually found by reading a magnetic compass and applying the correction for magnetic declination as discussed below.

  • Page 52: Prompts From Geomag

    Appendix G. Local Magnetic Declination G.2 Prompts from GEOMAG GEOMAG is accessed by calling 1-800-358-2663 with a computer and telephone modem, and communications program such as TERM or GraphTerm (PC208 Software). GEOMAG prompts the caller for site latitude, longitude, and elevation, which it uses to determine the magnetic declination and annual change.

  • Page 53: Declination Angles East Of True North

    Appendix G. Local Magnetic Declination FIGURE G-2. Declination Angles East of True North FIGURE G-3. Declination Angles West of True North...
  • Page 54 Appendix G. Local Magnetic Declination This is a blank page.

  • Page 55: Changing The Cr10'S Ram Or Prom Chips

    Appendix H. Changing the CR10's RAM or PROM Chips This section describes changing the CR10’s PROM, not the CR10X’s; the CR10X already contains Instruction 99. The CR10 has two sockets for Random Access Memory (RAM) and one socket for Programmable Read Only Memory (PROM).

  • Page 56: Installing New Prom

    Appendix H. Changing the CR10's RAM or PROM Chips H.3 Installing New PROM The PROM chip is found at location C8 on the CR10 CPU board, (see Figure H-2). With a small flat screw driver, gently pry out the PROM chip and replace it with the new one.
  • Page 57 Appendix H. Changing the CR10's RAM or PROM Chips FIGURE H-2. Jumper Settings for Different RAM Configurations...
  • Page 58 Appendix H. Changing the CR10's RAM or PROM Chips This is a blank page.

  • Page 59: Changing The 21X's Ram Or Prom Chips

    Appendix I. Changing the 21X's RAM or PROM Chips The 21X has 8 sockets for memory chips. Five sockets hold 8K Random Access Memory (RAM) chips and three hold Programmable Read Only Memory (PROM) chips. Older 21Xs may have two PROM chips and as few as two RAM chips. I.1 Disassembly of 21X Turn power off, remove the two Phillips head screws located near the edges of the front panel of the micrologger.

  • Page 60: Installing New Ram Chips

    Appendix I. Changing the 21X's RAM or PROM Chips I.2 Installing New RAM Chips The standard 21X has the maximum memory allowable. In the unlikely event that a RAM chip fails, the 21X can detect the bad chip during its power-up memory check.
  • Page 61 Appendix J. Telonics Model TGT1 Certification by NOAA/NESDIS...
  • Page 62 This is a blank page.

  • Page 63: High Resolution 18-Bit Binary Format

    Appendix K. High Resolution 18-Bit Binary Format When using the binary 18 bit signed 2’s complement integer format, all data values in the datalogger final storage area must be in high resolution format. In most cases the datalogger program should set the data resolution to high at the beginning of the program.
  • Page 64 Appendix K. High Resolution 18-Bit Binary Format Where 17 represents bit 17 - the most significant bit and is used to determine the sign. Converting the 18 bit data point to an integer can be done manually. Don’t forget the 18 bits are numbered 0 through 17. Bit 17 is the sign bit, when bit 17 is set, the number is negative.

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