ashtech ZY-12 Information Supplement page 48

cursor to MORE. This displays the next datums that are available (Figure 3.17).
Select MORE again to view the remaining datums.
Figure 3.17. More Datums
Fifty datum selections are available under this option. For a complete list,
alphabetic by datum, of the transformation parameters that each datum applies to
the pseudo-range positions, see Appendix A.
USER lets you input your own datum parameters (Figure 3.18). Table 3.15
describes the screen parameters.
Figure 3.18. User Datum Subscreen
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ZY-12 GPS Receiver