Rapid Changes in the Infrared Signature of Ships – The CFAV Quest as a Surrogate Frigate

  1. Daya, Z.A.
  2. Hutt, D.L.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
The Infrared (IR) signature of a ship is strongly dependent on its state of operation and on its environment. Changes in the environment and in the ship’s operation result in time-dependent variation in the ship’s IR signature. Here, we have considered two simple scenarios to examine the effect on the ship signature due to sunrise and due to a rapid change in the ship’s heading. The former is a slow process with a duration of several minutes while the latter is about ten times faster. Using ShipIR, a state-of-the-art ship IR modeling software, we have computed the IR signature of the CFAV Quest, a surrogate for a frigate, on a typical summer morning in the Persian Gulf. We have modeled in ShipIR the contrast radiant intensity of the Quest in the nominal 3-5 µm mid-wave and 8-12 µm long-wave bands at an ideal observer as a function of range and azimuth. Our modeling results show that the mid-wave IR signature of the ship varies significantly on a time scale of several minutes during sunrise and more rapidly during a day-time 90º turn maneuver. We also find that long-wave IR signature of the ship shows appreciable temporal variation during sunrise but rather small and possibly inconsequential time-dependence during the turn maneuver. Our results underline the need to compile time-dependent responses in the IR signature of a ship over a broad systematic variation in geography, weather and operational tactics. Development of time-dependent models of the ship IR signature

Il y a un résumé en français ici.

infrared signatures;mid-IR, mid wave;far-IR, long wave;signature management;electro-optics;infrared sensors;infrared seekers;infrared radiance
Report Number
DRDC-ATLANTIC-TM-2007-311 — Technical Memorandum
Date of publication
01 Jan 2008
Number of Pages
CD ROM;Electronic Document(PDF)

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