TGW-4480 GEN 4 GPS Subsystems

The information below is provided for individuals who are still deploying these older systems. Some of the system information or limitations, information on frequency allocation or usage, and/or comments made on "state of the art" may be time sensitive or even outdated. Please contact Telonics if you have any questions about the information provided on this page.
Dimensions L x W x H (in, cm) Canister Weight (g) Estimated Weight with Collar (g) 1 YR Operational Life 2 YR Operational Life
2.78 x 1.8 x 1.42
7.0 x 4.5 x 3.5
210 416-582 3 hr fix interval / Argos uplink 6 hr every 6 days 8 hr fix interval / Argos uplink 8 hr every 12 days

The TGW-4480 is a fourth generation GPS-Argos system and includes a GPS receiver, an Argos transmitter, uGPSi controller/data logger and a VHF transmitter beacon. The unit was designed to be mounted on a collar for attachment to medium to large size terrestrial mammals. The system acquires GPS positions on a user determined schedule, transmits data via the Argos DCLS and stores the GPS positions in the nonvolatile onboard memory for download after the unit is recovered. These systems integrate satellite data recovery system with store on board capability. GPS-Argos systems should be deployed in applications where real time GPS positional data are required. Because the system has worldwide coverage, data can be recovered from any location in the world to meet the goals of the study design. In addition to GPS positional data, the unit is capable of collecting temperature and activity data on schedules independent of the GPS data collection schedule. All data are also stored in memory and selected data can be transmitted as required. All schedules for data collection and the operation of the beacon are user programmable either at the time of order or through a user friendly programming interface called Telonics Product Programmer, TPP (purchased separately). Data files recovered from Argos and data are downloaded from memory are handled with a data utility called Telonics Data Converter, TDC (purchased separately). TDC provides the end user with a report in the form .CSV file which can be opened in Excel. To download a recovered unit or to program units a TSC-3 cable and adapter is used to connect the user's PC serial port to the unit. The VHF beacon operates on an independent battery and can be used to track the animal during the operational life of the subsystem. The VHF transmitter reports on the performance of the GPS portion of the unit during the period of deployment and a mortality sensor can be used to determine if the animal is alive or dead. The VHF transmitter is also used to locate the unit for recovery.

Key Features

  • Lower current consumption provides a 100% increase in operational life or an increase in performance during that same operational time frame.
  • The newest GPS receiver technology provides faster time to fix.
  • Up to 12 positions per day can be recovered through Argos by using the innovative paging dating protocol.
  • More flexible programming schedules available to the user.
  • Single printed wiring board construction and higher integration makes the electronics more rugged and increases reliability in high shock/vibration environments.
  • uGPSi 20 is supported by GUI programming interface (TPP) making it possible for users to program their own systems and simulate the performance of the system prior to deployment.
  • The Telonics Data converter (TDC) provides complete data decoding of Argos DS files and supports complete memory downloading. TDC provides a standard .csv output file (comma separated value) with time stamps for all data collected. TDC can be run in the "batch mode" for hands off operation.

Operational Life Information

TGW-4480 Operational Life

Specifications: Electronic and Packaging

General System Specifications

Timing AccuracyTiming is synchronized to GPS time when available. If the GPS time is not then internal timing accuracy is:
6 min/year at 25° C
30 min/yr -20 to +40° C
47 min/yr -40 to +70° C
Available SensorsMortality, Activity, Temperature, Low Voltage
Memory CapacityCapable of storing 100K fixes in nonvolatile flash memory in association with other sensor data.
Argos TransmissionsSystem can be operated in a mode where unit transmits only during satellite overpasses based on the GPS location and the orbital parameters installed prior to deployment. (GPS-Argos systems only)

GPS Receiver Specifications

Standby Current0µA
Performance12 channels
-156 dBm tracking sensitivity
-142 dBm acquisition sensitivity
Time to First Fix (TTFF)40sec typical (with clear view of sky)

Argos Certified Transmitter Specifications: (GPS-Argos Configuration only)

RF Output Impedance50 Ohms
Operating FrequencyARGOS Frequencies
401.6300MHz to 401.6800MHz in 1 kHz Steps
Brazilian SCD-1, Channels C1 to C9
401.6180MHz to 401.6220MHz in 500Hz Steps
Frequency Stability+/- 0.5 ppm maximum from -30° to +70° C
+/- 2.0 ppm maximum from -40° to -30° C
Initial Frequency Error+/- 0.5 ppm maximum at +23°, +/- 2° C
Aging+/- 2.0 ppm maximum after 1 year
RF Power OutStandard Power Version:
400mW (+26dBm) or 500mW (+27dBm) nominal into 50 Ω (User selectable using TPP programming software)
High Power Version (H):
800 mW (29 dbm) +/-1db nominal into 50 Ω (User selectable using TPP programming software)

Note 1: Transmit current will increase by approximately 10% from the +25° C measurement. Conversely, at -40° C it will decrease by approximately 10% from the +25° C measurement.
Note 2: Transmit current and RF power out are sensitive to VSWR. Both can be degraded significantly if the antenna or antenna coax are of poor quality or not correctly tuned and matched to the ARGOS/Brazilian frequency band 50 ohm RF output impedance.
Spurs and Harmonics<-40dBc minimum, -60dBc typical (Coherent Spurious)
<-50dBc minimum, -60dBc typical (Non-coherent spurious)

MK10 µGPSI-020 VHF Transmitter Specifications

Available Frequency OptionsOption 705 140-154 MHz;
Option 707 144-158 MHz;
Option 715 154-171 MHz;
Option 720 160-177 MHz;
Option 740 174-192 MHz;
Option 750 191-210 MHz;
Option 760 210-237 MHz

The MK10 frequency can be programmed in 100Hz steps within a given frequency range.
Frequency StabilityBetter than ±3ppm at room temperature;
±5 ppm total tolerance over full temperature range
Operating Temperature-40° to + 70°C (end user must ensure that the power supply/battery can provide the required peak current and voltage)
Pulse WidthProgrammable (10 to 250 msec)
Pulse PeriodProgrammable (560 to 5000 msec)
3 separate pulse period values selectable:
Period 1 (indicates last GPS fix successful)
Period 2 (indicates last GPS fix unsuccessful)
Mortality period (if no motion for selected time)
Available SensorsMortality Sensor (parameters are user programmable)
Transmitter TimingProgrammable seasons and duty cycles
Power OutputProgrammable Low/Medium/High power.
Effective Isotropic Radiated Power (EIRP) varies, depending on packaging, antenna configuration, and immediate environmental conditions.
* California Users: This transmitter meets the California requirement of EIRP <0.009W for all configurations.
Emission Designator2k00P0N
Harmonic SuppressionBetter than 30dB (>40 dB typical)
Spurious Emissions<-35 dBc at 10kHz offset from carrier
Power Supply2.5-5.5 Vdc
Peak Transmit Current19mA/25mA/34mA (Low/Med/Hi)
Quiescent Current<10uA between VHF pulses
FrequencyAging: <1ppm/yr
Shock: <1ppm 3000g x 0.3ms x ½ sine x 3 dir
VSWRRF output stable to 10:1 VSWR, all phases
Radiated harmonic levels are degraded with poor load VSWR.
Spurious emission specification maintained for >10:1 VSWR
ProgrammingTransmitter parameters programmable via antenna "1-pin" interface and Telonics TPP PC software.

Packaging/Housing Specifications

Hermetic Metal CanistersElectronics are sealed in hermetic metal canisters containing the electronics, batteries, and all interconnects. Glass to metal feed-thru technology is used to exit antennas and power. This packing is hermetic and can be tested utilizing a helium leak bomb test for hermeticity to assure < 1 part in 106 atmospheric CC per second.

GPS Antenna Specifications

Collared Mounted GPS AntennaIn collar mounted wildlife configurations, the GPS antenna is designed to be mounted on the dorsal surface of the neck. The GPS antenna is installed in a high impact nonconductive plastic housing. The form of the housing presents sloping sides so that it will be impervious to chewing and gnawing as is possible. A highly armored antenna cable connects the GPS antenna to the instrument package.

Collar Specifications

Collared DesignsCollar designs are species specific.

Service Commitment

Since 1970, Telonics has built a reputation based on product quality, product support, service, and customer satisfaction. Telonics strives to produce the highest quality products, and to support those products accordingly.

Because of extreme conditions and the unpredictable nature associated with most telemetry applications, problems occasionally arise. Most problems can be resolved quickly. In all cases, we hope to be able to work in partnership with users to resolve problems to the user's satisfaction and to uphold our demonstrated commitment to excellence. If problems should arise, all products must be returned to our factory for failure analysis.

Warranty: GEN 4 GPS Systems

Telonics warrants its GPS products to be free from defects in material and workmanship for a period of one year from the date acquired. Telonics does not warrant batteries.

Telonics designs and manufactures systems for a variety of applications using several satellite systems (GPS, Argos, Iridium, and Globalstar). At the time of manufacturing, Telonics equipment is tested to verify compatibility with the applicable satellite system(s). Telonics does not warranty equipment against changes in satellite system specifications or satellite operation after the date your equipment was manufactured. Unforeseeable or unplanned system changes would include, but are not limited to, elevated ambient noise levels in the radio frequency bands used for satellite communications, elimination of service in a region of the world, data outages due to technical problems within the satellite system network, or reductions in data transfer capability due to alterations in the constellation as a result of premature space vehicle failures or failure to replace space vehicles in a timely manner.

If a defect occurs, return the equipment to us within the proper time frame at the following address: TELONICS, 932 E. IMPALA AVENUE, MESA AZ USA 85204-6699. The customer shall arrange for and pay all shipping, insurance and related charges incurred in the shipment to and from Telonics under this warranty. Damage to any equipment resulting from misuse, accidents, unauthorized service, extreme conditions, or other causes, is excluded from this warranty. Telonics does not assume responsibility for loss or damage to equipment during shipment. Telonics does not assume responsibility for delays resulting from shipment on commercial or private carriers. We insure all equipment shipped from our facility and suggest that shipments to Telonics also be insured.

Upon the timely return to our facility, if defective, the product will be replaced or repaired at our discretion at no cost to the customer. This remedy is the exclusive remedy. This product is supplied without any further warranties or conditions, expressed or implied, including warranties of merchantability, quality or fitness for particular reason or those arising by laws, statutes or trade usage or course of dealing. The entire risk, as to the results and performance of the product, is assumed by the customer. Neither Telonics, nor its suppliers, shall have any liability to the customer or any other person or entity for any indirect, incidental, special, or consequential damage whatsoever, regardless whether Telonics has been told of the possibility of such damages or that such damages might be foreseeable. Telonics has no responsibility or liability for the claims of any third party. The maximum aggregate to the customer, of Telonics and its suppliers, shall not exceed the amount paid by the customer for the product.