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A geodetic control network is a network, often of triangles, that are measured precisely by techniques of control surveying, such as terrestrial surveying or satellite geodesy. It is also known as a geodetic network, reference network, control point network, or simply control network.
G GNSS (If the letter G is used, the types of external GNSS augmentation, if any, are specified in Item 18 following the indicator NAV/ and separated by a space.) H HF RTF (HF RadioTelephone) I INS; J1 CPDLC ATN VDL Mode 2; J2 CPDLC FANS 1/A HFDL; J3 CPDLC FANS 1/A VDL Mode A/0; J4 CPDLC FANS 1/A VDL Mode 2; J5 CPDLC FANS 1/A SATCOM
A Selective Availability Anti-spoofing Module (SAASM) is used by military Global Positioning System receivers to allow decryption of precision GPS observations, while the accuracy of civilian GPS receivers may be reduced by the United States military through Selective Availability (SA) and anti-spoofing (AS). [1]
Surveying — Survey-Grade GNSS receivers can be used to position survey markers, buildings, and road construction. [6] These units use the signal from both the L1 and L2 GPS frequencies. Even though the L2 code data are encrypted, the signal's carrier wave enables correction of some ionospheric errors.
It is a military-grade, dual-frequency receiver, and has the security hardware necessary to decode the encrypted P(Y)-code GPS signals. Manufactured by Rockwell Collins , the DAGR entered production in March 2004, with the 40,000th unit delivered in September 2005.
The NMEA 0183 standard uses a simple ASCII, serial communications protocol that defines how data are transmitted in a "sentence" from one "talker" to multiple "listeners" at a time. Through the use of intermediate expanders, a talker can have a unidirectional conversation with a nearly unlimited number of listeners, and using multiplexers ...
A surveyor uses a GNSS receiver with an RTK solution to accurately locate a parking stripe for a topographic survey. Real-time kinematic positioning (RTK) is the application of surveying to correct for common errors in current satellite navigation (GNSS) systems. [1]
Its products and technology are used in agricultural, marine, surveying, GIS mapping, and machine control markets. [2] Founded in 2013, it was created after Beijing UniStrong Science & Technology acquired Hemisphere GPS, which was subsequently renamed AgJunction. [3]