ashtech ZY-12 Information Supplement page 81

Table 3.26. Visibility Parameters (continued)
Parameters
PRN 11
VERTICAL LINES
Screen Descriptions
In the upper right corner, contains the number of the PRN whose
window is currently marked by the dotted reader-line.
Pressing the up or down arrow raises or lowers the reader-line.
2-hour time marks. The current time is stated as GMT and is
rounded to the nearest hour. Each time the screen is entered, the
time marks are recalculated to show the previous, nearest 2 hours
of availability; 12 and 12 GMT are the times for the first and last
vertical lines.
Description
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