Sokkia X-1000 series Operator's Manual page 61


Lost Prism
In the event that an obstacle prevents the instrument sighting the target during Auto Tracking, the
instrument will predict the direction in which the target will travel and continue Auto Tracking based on this
prediction for the time period set in "Forecast time". If the instrument re-acquires the target in this predicted
direction, Auto Tracking continues without change. If the target is not re-acquired however, the target is
considered "lost" ("Target lost" status) and the instrument starts "Prism wait" and "Search (twice)" in order.
If the instrument re-acquires the target in this process, Auto Tracking continues.
"Prism wait" will continue for the time period set in "Wait time".
If the target is not re-acquired after "Search (twice)", sighting terminates. Start Auto Tracking procedure
again from step 1.
"Wait time" being set to "HOLD" (no limits), Auto Tracking procedure is as follows. The telescope does not
move and keeps "Prism wait" status and when the prism comes into the field of view, the instrument starts
Auto Tracking.

"Forecast time" (duration of search in predicted direction) and "Wait time" settings: "10.1 Auto
Pointing and Auto Tracking Settings" step 4

Difference in search and measuring distance operation
Operating icons related to sighting and measuring distance are different between Auto Pointing models
and Auto Tracking models.
Search and measuring distance operations initiated by related Operating icons are different depending on
the setting of "Track setting" and "Search method" in <Search/Track>.
• Auto Pointing model (there is no Operating icons related to Auto Tracking). l
"Search/
Track"
setting
Operating
icon
[SRCH]
[MEAS]
Auto Tracking
Obstacle
Auto Tracking continues in predicted
direction
Target not found
"Target lost"
Target not found
"Prism wait"
Target not found
Search (twice)
Target not found
Sighting terminates (Auto Tracking idle)
When "Search" set in "Track Setting"
"Srch method" is fixed to "G.S."
Performs Auto Pointing
Performs Auto Pointing then angle/
distance measurement
10. TARGET SIGHTING AND MEASUREMENT
Target found
Target found
Target found
Target found
When "None" set in "Track Setting"
Performs angle and distance
measurement
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