Specifications; Accuracy; Self-Test Procedure; Direct-Y Acquisition And Tracking - ashtech ZY-12 Information Supplement

Specifications

Accuracy

Static, Rapid Static or Pseudo-Kinematic Survey: 5 mm + 1 ppm
Real-time Differential Position: <1 m (PDOP <4)
Static occupation time: 2 seconds (typ)
Sub-centimeter accuracy with longer occupation time.
Azimuth: 0.15° + 1.5/baseline length in km

Self-test Procedure

Self-test is automatic on power-up. Reacquisition is automatic if loss of lock
occurs.

Direct-Y Acquisition and Tracking

Automatic when keyed.

C/A Acquisition and Y Tracking

Automatic when keyed.

Direct Y with L2

Automatic when keyed.

Selective Availability

Selective Availability (SA) is removed, if it is active, when the ZY-12 is keyed.
When it is not keyed SA will degrade the accuracy. Currently SA is not active.

Zeroizing Procedure

The ZY-12 is operational when keyed. The zeroizing key will put the ZY-12 into Z-
tracking mode.
There are two ways to zeroize:
1. Front Panel, Screen 4, Sub-screen SECURITY MODULE, Zeroize Y/N
2. Serial Command $PASHS,ZER.
3. Push PWR OFF Zeroize on back panel.
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ZY-12 GPS Receiver