| (OBS) This record contains a source point name, target point name, horizontal observation, vertical observation, slope distance and descriptive code.
The vertical observation (zenith or horizontal) depends on the type specified in the most recent instrument record. This record appears in a review as F1, but prints and transmits as an observation (OBS) record with an F1 derivation code.
(POS) This record contains a point name, the points cordinates (NEZ) and a descriptive code.
(MC) This record contains observation data adjusted for orientation, collimation, instrument height, target height, prism constant (if applied by the SDR33/31), atmospheric, curvature and refraction corrections.
(RED) This record contains observation data reduced to its horizontal and vertical components, with the sea level correction applied where applicable. |
