senseFly EBEE RTK Extended User Manual page 188

Specifications
Glossary
AMSL Above Mean Sea Level
Your eBee RTK's altitude can be shown and set in eMotion using ATO or
AMSL. Your drone uses the EGM96 mean sea level standard for navigation.
ATO Above the Take-off Altitude
Your eBee RTK's altitude can be shown and set in eMotion using ATO or
AMSL. Altitudes in ATO are relative to the place your eBee RTK started its
motor just before take-off.
DSM Digital Surface Model
A 3D digital representation of a surface.
FTDI Future Technology Devices International
A Scottish semiconductor device company specialising in Universal Serial
Bus (USB) technology. FTDI cables allow serial connections through a USB
cable. eMotion uses FTDI technology to connect to the ground modem.
You can often connect a computer to a GNSS base station using FTDI.
GCP Ground Control Point
A location or object on the ground that has precisely know coordinates.
GCPs are used to improve the precision of DSMs created from photogram-
metric analysis of a series of images.
geo-reference A data point associated with a specific location on the earth's sur-
face.
GNSS Global Navigation Satellite System
A network of satellites that transmit signals that GNSS receivers can use to
calculate their position on the Earth. GPS (Global Positioning System) and
GLONASS are examples of GNSS systems.
GSD Ground Sampling Distance
The distance measured on the ground between pixel centres in an image
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