Essential Components For Quality Surveying; Getting Acquainted - Javad TRIUMPH-1 Operator's Manual

1.4. Essential Components for Quality Surveying

Achieving quality position results requires the following elements:
• Accuracy – The accuracy of a position primarily depends upon the satellite geometry (Geometric
Dilution of Precision, or GDOP) and the measurement (ranging) errors.
– Differential positioning (DGPS and RTK) strongly mitigates atmospheric and orbital errors, and coun-
teracts Selective Availability (SA) signals the US Department of Defense transmits with GPS signals.
– The more satellites in view, the stronger the signal, the lower the DOP number, the higher posi-
tioning accuracy.
• Availability – The availability of satellites affects the calculation of valid positions. The more
visible satellites available, the more valid and accurate the position. Natural and man-made
objects can block, interrupt, and distort signals, lowering the number of available satellites and
adversely affecting signal reception.
• Integrity – Fault tolerance allows a position to have greater integrity, increasing accuracy. Several
factors combine to provide fault tolerance, including:
– Receiver Autonomous Integrity Monitoring (RAIM) detects faulty GNSS satellites and removes
them from the position calculation.
– Five or more visible satellites for only GPS or only GLONASS; six or more satellites for mixed scenarios.
– Satellite Based Augmentation Systems (WAAS, EGNOS, etc.) creates and transmit, along with
DGPS corrections, data integrity information (for example, satellite health warnings).
– Current ephemerides and almanacs.

2. Getting Acquainted

TRIUMPH-1 is a 216-channel GNSS receiver with internal batteries, up to two data ports, an interface for
controlling and viewing data logging (MinPad), an internal radio modem, a Bluetooth® wireless
technology module, and an optional GSM module.
The TRIUMPH-1 receiver's advanced design reduces the number of cable required for operation,
allowing you to survey more reliably and efficiently. The casing allocates space for two rechargeable
batteries, two SIM card slots, a Bluetooth® wireless technology module, a multi-system receiver board,
and a radio modem.
TRIUMPH-1 comes in one of the following configurations:
• with an UHF radio modem
• with a GSM module
• with an UHF radio modem and a GSM module
• without a radio modem and a GSM module
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Description and Operation
Getting Acquainted
Essential Components for Quality Surveying
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