TeeJet RX 400p - Manual (Page 65)

RX 400p
4-23 98-05044
R1
4.9.1.1 Precision Menu
The Precision@ menu provides information relating to the estimated real-time
precision of position computations. Please note that these are not absolute accuracy
estimates, but only relative measures. This menu is detailed in Figure 4-9.
Res rms: 0.3m?A
=_a:??????0.2m?^
=_b:??????0.1m
Azimuth:163.1!
=_Lat:????0.2m?
=_Lon:????0.2m
=_Alt:????0.3m
Back@
Top Menu@
Pressing the and keys allows you to scroll through the available menu items.
Pressing the button anywhere in this menu will provide a bar chart of signal
tracking information. Pressing the button with the Back@ or Top Menu@ item
in focus will take the menu system to the previous menu or the Main menu,
respectively.
Res rms: 0.3m A
This menu item displays the root mean square of
the residuals that result from a position
computation. This value provides an estimate of
the position accuracy, and approximates one
standard deviation of horizontal precision.
=_a: 0.2m?^
This menu item indicates the length of the semi-
major axis of the horizontal position’s error
ellipse, to a confidence of one standard deviation.
=_b: 0.1m
This menu item indicates the length of the semi-
minor axis of the horizontal position’s error
ellipse, to a confidence of one standard deviation.