Survey Devices We Use

We Use Handheld GPS Receivers to Collect GCPs


garmin Instrument Specification:Brand: Garmin

Display: 2.2 inch Monochrome display

Use: Displays location, terrain, difficulty, hieghts and area description.

Battery: Powered By Two AA, 25 hour Battery life.

Additional features: Waterproof GPS, Easy to use, High sensitivity, WAAS enabled, Hotfix satellite,rediction, Worldwide Base Map, Paperless Geocaching.

juno Instrument Specification:Brand: Trimble Juno SA

Physical Size:  12.9 cm × 7.4 cm × 3.0 cm (5.1 in × 2.9 in × 1.2 in) Weight: 0.23 kg (0.52 lb) with battery

Processor: 533 MHz Samsung S3C2443 processor

Memory:  128 MB RAM and 128 MB internal Flash storage

Battery:  Internal 2600 mAh lithium-ion, rechargeable in unit

GPS Channels:  12 (L1 code only)

Integrated real-time: SBAS1

Update rate:  1 Hz

Time to first fix:  30 seconds (typical)

Protocols:SiRF, NMEA-0183

Accuracy (HRMS)4 after differential correction

Code Post processed:  1–3 m5

Real-time (SBAS1 ): 2–5 m

r1 Instrument Specification:Brand: Trimble R1

Sensor type: L1/G1 GNSS receiver and antennaSystems: GPS, GLONASS, Galileo, Beidou, QZSS

Channels: 44-channel, parallel tracking

Correction sources: SBAS, ViewPoint RTX, QZSS, VRS SBAS:4-channel, parallel tracking WAAS, EGNOS, MSAS GAGAN, SBAS ranging

Receiver Protocols: NMEA 0183 v4.00, Binary

Update rate: 1 Hz

Time to first fix: 45s typically

Reacquisition: < 2s

Real time correction protocols: CMR,CMR+,CMRx RTCM 2.1, 2.2, 2.3, 3.0, 3.1

SBAS accuracy1: <100 cm

Code DGNSS accuracy (VRS / RTK)1: 75cm + 1 ppm HRMS

ViewPoint RTX1: 50 cm

HRMS Maximum speed: 1,850 kph / 1,150 mph / 999 knots

Maximum altitude: 9,000 m (29,520 ft)


 ts total station or TST (total station theodolite) is an electronic/optical instrument used in modern surveying and building construction. The total station is an electronic theodolite (transit) integrated with an electronic distance meter (EDM) to read slope distances from the instrument to a particular point.



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