ATP-3-09-02 Field Artillery Survey Download
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Angle Determination 16 February 2016 ATP 3-09.02 5-5 WARNING Never look at the sun through the telescope. Doing so may cause loss of eyesight. 5-8. To perform diopter adjustment, direct the telescope towards a blank area. While looking through the eyepiece, rotate the diopter ring to bring the reticle crosshair into sharp focus. 5-9. To eliminate parallax (the apparent displacement of an observed object due to the difference between two points of view) rotate the focusing ring to bring the target image into focus on the reticle crosshair. Move your eye vertically and horizontally to see if the target image moves in relation to the reticle crosshairs. If the target image does not move, there is no parallax. If the image does move, rotate the telescope focusing ring to eliminate the parallax. INITIAL SETTING PROCEDURES 5-10. Prior to using the NIKON NE-102 theodolite for artillery survey procedures, the factory default settings must be changed. 5-11. To conduct a proper turn on sequence press the power switch while simultaneously holding down the reset key (see figure 5-4). Release the power switch prior to releasing the reset key The LCD will light up for approximately 1 second, and then the screen will show the Version Number Display, followed by a display of the first item which is “Minimum Angle Unit Selection”. Figure 5-4. NE-102 Turn on procedure 5-12. The following options are available for minimum angle selection. For 4 th order survey 0.02 mil and 5 th order survey 0.05 mil (see figure 5-5 on page 5-6). The value headed with the highlighted black square is the current selection. To change the setting, depress the RESET key and the position of the highlighted black square will be switched over. Once the selection is made, depress the HOLD key to fix the setting and proceed to the next setting item.