TMO Flashcards
Precision refers to?
Measurements
Accuracy refers to?
Error
CE or Circular Error is?
The geospatial position horizontal accuracy expressed in feet or meters at 90% probability.
LE or Linear Error is?
The geospatial position vertical accuracy expressed in feet or meters at 90% probability.
For targeting, CE and LE should be reported at?
90%
Combined CE and LE determine the?
TLE
TLE or Target Location Error is the difference between?
The actual and expressed location of a target. TLE error is intrinsic to the sensor.
CEP is Circular Error Probable:
The geospatial horizontal accuracy expressed in feet or meters at 50% probability.
CEP error is intrinsic to the weapons system
HAE is?
Height above ellipsoid is the distance above or below an ellipse with a mathematically defined regular surface used to express a geometric model of the earth.
It was derived by using satellites to find the exact center of the Earth and creating an ellipse of 3,930 mile radius from that point out to the 45 degree latitude lines.
MSL:
Mean Sea Level is a tidal datum that is arithmetic mean of hourly elevation observed over a specified 19 year cycle.
It averages out tidal highs and lows caused by the changing effects of the gravitational forces of the sun and moon.
The CE and LE category 1 standard for targeting is ?
6 m or 20 Ft.
GEOTRANS is?
a NCA validated program that allows converting geographic coordinates among a wide variety of coordinate systems, map projections and datums
Datum?
A base reference for a coordinate system used to model the earth; there are two categories of a datum, Horizontal and Vertical
The vertical datum that is native to DPPDB is
EGM 96
Photogrammetry is?
The art and science of making measurements from photographs / imagery
The basic types of imagery are?
Electro Optical
Infra red
Synthetic Aperture Radar
The current imagery sources that can generate imagery used by the military are?
National technical means and the Air breather theater systems; Predator, IGNAT, Shadow, Global Hawk, P-3 Orian, U-2 Dragon Lady, E-8 JSTARS and Scan Eagle
Metadata?
Metadata allows the community to search and archive imagery
It also interfaces with other applications in geo positioning
Most importantly, it provides geo coordinates.
What impact does light, shadow and image angle have on target marker placement and why
Obliquity and error can skew the coordinates of an image increasing the search time in terrain recognition.
In mountainous terrain, adverse look angle and obliquity can be challenging
Shadows can help identify what you are looking at. Washout can inhibit image resolution
Mono Imagery and Stereo Imagery
Mono Imagery is a 2-D representation of a 3-D world
Stereo Imagery uses multiple image captures of the same area and allows us to look at the same thing from two different angles
Stereo Imagery allows us to accurately determine feature height.
Image Obliquity-
The difference between the reference elevation and the actual terrain elevation creating a possible horizontal error.
Sensor location, altitude, look angle platform / sensor accuracy and ground track are all error sources for what?
Image obliquity
Key features or characteristics to properly employ terrain recognition are?
North arrow orientation, look angle, lakes and rivers, roads and paths, structures and buildings, vegetation and sold patterns, light and shadow.
It is important that you have all of the current digital point positioning data base DPPDB for your area of operation and purge obsolete DPPDB for?
accuracy and currency of the imagery
