Figure 1-10. Comparison of IR with Photograph.
8. IR mensurations. The scaling and measurements of IR imagery are similar to vertical
photography, using the formula ground distance (GD) = photo distance (PD) x denominator of
the photo representative fraction (DPRF). Refer to subcourse IT 0644, Vertical
Photogrammetry, for additional studies.
NOTE:
Due to the scan technique and the emissivity factor of different objects on the
ground, the measurement will not be 100 percent accurate.
PART C: INFRARED MISSION REQUESTING
1. Three different air reconnaissance request formats are used by US forces for IR R&S
missions.
2. Joint Tactical Air R&S Request Form (Figure 1-11) is used by mission requesters.
Specific information as to how to complete this form can be obtained by consulting IT 0661,
R&S Managing, Requesting, Monitoring, and Communications.
IT0654
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