เปรียบเทียบวิธี

	เทอร์คอม (TERCOM)	เทคนิค RTK ของระบบ GNSS
สาขาวิชา	การบินและอวกาศ	การบินและอวกาศ
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	1980s	1980s
ผู้ริเริ่ม	Boeing, military guidance	GPS constellation
ประเภท	Localization method	Positioning method
แหล่งต้นตำรับ	Golden, J. P. (1983). Terrain contour matching (TERCOM): A cruise missile guidance aid. In In-Flight Measurement Technology. AGARD Conference Proceedings No. 336, 3–1 to 3–16.	Teunissen, P. J. G., & Kleusberg, A. (Eds.). (2003). GPS for Geodesy (2nd ed.). Springer-Verlag.
ชื่อเรียกอื่น	TerCom, terrain-aided navigation, TANS	RTK, Real-Time Kinematic positioning, GNSS-RTK, differential GNSS
ที่เกี่ยวข้อง	3	3
สรุป	Terrain Contour Matching (TERCOM) is a terrain-aided navigation method that corrects position estimates by matching altimeter measurements against a stored digital elevation map (DEM). Developed by Boeing in the 1980s for cruise missile guidance, TERCOM enables accurate navigation in GPS-denied environments by exploiting the unique terrain signature at each location. TERCOM remains essential for missile guidance, autonomous underwater vehicles, and systems operating in jamming scenarios.	Global Navigation Satellite System Real-Time Kinematic (GNSS RTK) is a high-precision positioning technique that uses carrier phase measurements from a reference receiver at a known location to correct the position estimates of a rover receiver in real time. Developed in the 1980s, RTK exploits spatial correlation of atmospheric errors to achieve centimeter-level accuracy within tens of kilometers of the reference station. RTK is now standard in surveying, construction, autonomous vehicles, and precision agriculture.