Terminology

API keys - Simple and secure credentials for using your application with HERE APIs.
ASN.1 - Formal notation used for describing data transmitted by telecommunications protocols like LPP.
Assistance data - Navigation models and other data (for example, ionospheric model) that aids the calculation of GNSS position in device.
Beidou - Global navigation satellite system operated by China.
Correction data - Data that helps position GNSS receivers more accurately.
Galileo - Global navigation satellite system created by the European Union.
GLONASS - Global navigation satellite system operated by Russia.
GNSS - Global Navigational Satellite System. An umbrella for all satellite systems like GPS, GLONASS, Galileo, Beidou, and QZSS.
GPS - Global Positioning System owned by the United States.
HD GNSS - High Definition GNSS, a HERE product providing correction data services.
LPP - 3GPP defined LTE Positioning Protocol.
Navigation model - Ephemeris (orbit) data and clock model for a satellite.
OAuth - Open Authorization framework. Industry-standard protocol for authorization.
PE - Position Engine, client software running the position algorithms.
PPP - Precise Point Positioning, a positioning technique behind HD GNSS product utilizing SSR correction data.
Protobuf - Google's language-neutral, platform-neutral, extensible mechanism for serializing structured data.
QZSS - Quasi-Zenith Satellite System. Regional navigation satellite system commissioned by Japan.
SSR - State Space Representation. Correction data that models major errors over large areas.
TTFF - Time to first fix. The time required for a GPS navigation device to acquire satellite signals and navigation data and calculate a position.
UPER - Unaligned Packet Encoding Rules, efficient and compact format for encoding ASN.1 data structures
WebSocket - Computer communications protocol providing full-duplex communication channels over a single TCP connection.*