generated: '2026-08-29' method: searched source: https://www.swiftnav.com/glossary (enumerated from https://www.swiftnav.com/page-sitemap.xml) name: Swift Navigation GNSS glossary description: >- Swift Navigation publishes a 69-entry glossary of GNSS, positioning and automotive-safety terminology, one crawlable page per term, all listed in the site's own sitemap. It is the closest thing the company has to a published vocabulary, and it is genuinely load-bearing for anyone reading the rest of this profile: the mountpoint names, sourcetable fields and SBP message semantics all assume these definitions. Terms are enumerated from the sitemap; the definitions themselves live at the linked URLs and are not copied here. term_count: 69 index: https://www.swiftnav.com/glossary terms: - term: observations in gnss url: https://www.swiftnav.com/glossary/what-are-observations-in-gnss - term: cors continously operating reference station network url: https://www.swiftnav.com/glossary/what-is-a-cors-continously-operating-reference-station-network - term: datum url: https://www.swiftnav.com/glossary/what-is-a-datum - term: gnss constellation url: https://www.swiftnav.com/glossary/what-is-a-gnss-constellation - term: gnss measurement engine url: https://www.swiftnav.com/glossary/what-is-a-gnss-measurement-engine - term: gnss protection level url: https://www.swiftnav.com/glossary/what-is-a-gnss-protection-level - term: gnss rover url: https://www.swiftnav.com/glossary/what-is-a-gnss-rover - term: gnss station url: https://www.swiftnav.com/glossary/what-is-a-gnss-station - term: positioning engine url: https://www.swiftnav.com/glossary/what-is-a-positioning-engine - term: reference frame url: https://www.swiftnav.com/glossary/what-is-a-reference-frame - term: virtual reference station vrs url: https://www.swiftnav.com/glossary/what-is-a-virtual-reference-station-vrs - term: adas url: https://www.swiftnav.com/glossary/what-is-adas - term: alert limit url: https://www.swiftnav.com/glossary/what-is-an-alert-limit - term: inertial measurement unit imu url: https://www.swiftnav.com/glossary/what-is-an-inertial-measurement-unit-imu - term: rtk baseline url: https://www.swiftnav.com/glossary/what-is-an-rtk-baseline - term: asil url: https://www.swiftnav.com/glossary/what-is-asil - term: aspice url: https://www.swiftnav.com/glossary/what-is-aspice - term: beidou url: https://www.swiftnav.com/glossary/what-is-beidou - term: dead reckoning url: https://www.swiftnav.com/glossary/what-is-dead-reckoning - term: differential gnss url: https://www.swiftnav.com/glossary/what-is-differential-gnss - term: earth centered earth fixed url: https://www.swiftnav.com/glossary/what-is-earth-centered-earth-fixed - term: fixed rtk url: https://www.swiftnav.com/glossary/what-is-fixed-rtk - term: float rtk url: https://www.swiftnav.com/glossary/what-is-float-rtk - term: functional safety url: https://www.swiftnav.com/glossary/what-is-functional-safety - term: galileo url: https://www.swiftnav.com/glossary/what-is-galileo - term: geofencing url: https://www.swiftnav.com/glossary/what-is-geofencing - term: glonass url: https://www.swiftnav.com/glossary/what-is-glonass - term: gnss url: https://www.swiftnav.com/glossary/what-is-gnss - term: gnss accuracy url: https://www.swiftnav.com/glossary/what-is-gnss-accuracy - term: gnss precision url: https://www.swiftnav.com/glossary/what-is-gnss-precision - term: gps url: https://www.swiftnav.com/glossary/what-is-gps - term: gps jamming url: https://www.swiftnav.com/glossary/what-is-gps-jamming - term: gps latency url: https://www.swiftnav.com/glossary/what-is-gps-latency - term: gps spoofing url: https://www.swiftnav.com/glossary/what-is-gps-spoofing - term: hardware in the loop hitl testing url: https://www.swiftnav.com/glossary/what-is-hardware-in-the-loop-hitl-testing - term: integrity url: https://www.swiftnav.com/glossary/what-is-integrity - term: integrity risk url: https://www.swiftnav.com/glossary/what-is-integrity-risk - term: ionospheric delay url: https://www.swiftnav.com/glossary/what-is-ionospheric-delay - term: iso 21448 sotif url: https://www.swiftnav.com/glossary/what-is-iso-21448-sotif - term: iso 26262 url: https://www.swiftnav.com/glossary/what-is-iso-26262 - term: iso sae 21434 url: https://www.swiftnav.com/glossary/what-is-iso-sae-21434 - term: l band url: https://www.swiftnav.com/glossary/what-is-l-band - term: line of sight los in gnss gps url: https://www.swiftnav.com/glossary/what-is-line-of-sight-los-in-gnss-gps - term: multi constellation gnss url: https://www.swiftnav.com/glossary/what-is-multi-constellation-gnss - term: multipath error in gnss url: https://www.swiftnav.com/glossary/what-is-multipath-error-in-gnss - term: network rtk url: https://www.swiftnav.com/glossary/what-is-network-rtk - term: nmea url: https://www.swiftnav.com/glossary/what-is-nmea - term: ntrip url: https://www.swiftnav.com/glossary/what-is-ntrip - term: osr observation space representation in gnss url: https://www.swiftnav.com/glossary/what-is-osr-observation-space-representation-in-gnss - term: positioning navigation and timing pnt url: https://www.swiftnav.com/glossary/what-is-positioning-navigation-and-timing-pnt - term: ppp rtk url: https://www.swiftnav.com/glossary/what-is-ppp-rtk - term: precise point positioning ppp url: https://www.swiftnav.com/glossary/what-is-precise-point-positioning-ppp - term: pseudorange in gnss url: https://www.swiftnav.com/glossary/what-is-pseudorange-in-gnss - term: qzss url: https://www.swiftnav.com/glossary/what-is-qzss - term: rinex url: https://www.swiftnav.com/glossary/what-is-rinex - term: rtcm radio technical commission for maritime services url: https://www.swiftnav.com/glossary/what-is-rtcm-radio-technical-commission-for-maritime-services - term: rtk real time kinematic url: https://www.swiftnav.com/glossary/what-is-rtk-real-time-kinematic - term: safety of the intended functionality sotif url: https://www.swiftnav.com/glossary/what-is-safety-of-the-intended-functionality-sotif - term: sbas satellite based augmentation system url: https://www.swiftnav.com/glossary/what-is-sbas-satellite-based-augmentation-system - term: single baseline rtk url: https://www.swiftnav.com/glossary/what-is-single-baseline-rtk - term: software in the loop testing url: https://www.swiftnav.com/glossary/what-is-software-in-the-loop-testing - term: state space representation ssr in gnss url: https://www.swiftnav.com/glossary/what-is-state-space-representation-ssr-in-gnss - term: target integrity risk url: https://www.swiftnav.com/glossary/what-is-target-integrity-risk - term: international reference frame itrf url: https://www.swiftnav.com/glossary/what-is-the-international-reference-frame-itrf - term: wide area augmentation system waas url: https://www.swiftnav.com/glossary/what-is-the-wide-area-augmentation-system-waas - term: time to first fix url: https://www.swiftnav.com/glossary/what-is-time-to-first-fix - term: tropospheric delay url: https://www.swiftnav.com/glossary/what-is-tropospheric-delay - term: v2x vehicle to everything url: https://www.swiftnav.com/glossary/what-is-v2x-vehicle-to-everything - term: wheel odometry url: https://www.swiftnav.com/glossary/what-is-wheel-odometry