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O n June 11, 1997,
Survey Equipment Services Inc., purchased the business and assets of Data Transmission
Systems (DTS) of Baton Rouge, Louisiana. Since 1991, DTS have been
manufacturing High Frequency Telemetry Systems for the transmission of
Differential GPS Corrections and other data.
T he LRD
product range is in use world wide as an alternative to the more expensive
Satellite delivered DGPS Correction Systems or in areas of the world
where satellite delivered corrections are not available.
S ignal ranges for this product allows for long range
Data Transmission and typical distances of 150 miles are achievable and
therefore, an effective long range DGPS correction telemetry system has
been achieved with the creation of the LRD series of equipment.
.
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SES.LRD1 Mobile Data Receiver
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SES.LRD2 Base Station Modulator
·
SES.LRD3 Active Antenna
DTS - Data Transmission Systems Inc., now owned by Survey
Equipment Services Inc., perfected the use of surface wave propagation
technology for long range DGPS data links. Developing the first long range
data receiver that is application specific and frequency agile is why the
LRD product range is considered the leader in this field. The LRD-1
Data Receiver is specifically designed for the reception of digital data in
the frequency range of 1.7 to 7.0 MHz, operating at a data rate of 300 bits
per second.
The LRD-2 Modulator is a self contained FSK Modulator specifically
designed to operate in conjunction with the LRD-1 data receiver. The
LRD-2 provides the interface between the GPS reference receiver and the HF
Transmitter.
The LRD-3 Active Antenna is designed to amplify desired signals at the
operating frequency selected on the LRD-1. The antenna derives its
power from the LRD-1 via the antenna cable connections and is capable of
operating within two operator selectable frequency bands.
The LRD Series of Equipment is also built to withstand the rigorous
demands that are found in both onshore and offshore project environments.
This system offers a cost-effective solution to real-time, long range
Differential GPS. It has been tested and proven by some of the most
demanding operators in the world.
A detailed specification sheet for the LRD product range is available on
request.
Users of the LRD product Range
include:
- Western
Geophysical (Far East & USA)
- Geco Prakla (USA &
S. America)
- Petro Tech (Peru)
- K.C. Offshore
(USA)
- John E. Chance
(USA)
- Fugro (Middle East
& Canada)
- Seaway Technology
(UK)
- Britsurvey (UK)
- Svitzer(Denmark)
- Indian Navy
- Indian
Hydrographic Office
- Capital Signal
(Trinidad)
- Romana (Vietnam)
- AeroGeophysica (Russia)
- Maersk Company (Norway)
- Petrobras (Brazil)
- Halliburton (USA)
- Geofix (S. America)
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