ISR simulation tools

Part 1: Run simulations of the existing Poker Flat ISR

  • Choose the Poker Flat ISR in Single Pulse 480 microsecond mode

  • Run for 24 hours during Jan. 1st at a 45 degree elevation using 240 seconds of integration

  • Determine how many seconds you can reduce the integration period to and still have less than 10% error at all times at altitudes of:

    • 700 km

    • 500 km

  • Describe what happens when the integration period gets short.

Part 2: Run simulations of a modified Poker Flat ISR

Modify the Poker Flat radar by making it larger or smaller. Assume any area you add or subtract has active antenna, so the area and peak power will both scale together linearly. To do this, you will need to know the following parameters about the Poker Flat ISR:

  • Freq: 450E6 Hz

  • Area: ~ 900 m^2

  • Typical peak power: 1.7E6 W

  • Pulse length: 480.0E-6 seconds

  • Duty cycle: 0.096

  • Jan 1, 45 degree elevation.

  • Latitude 65 degrees, longitude -147degrees

Determine how many seconds you can reduce the integration period to and still have less than 20% error at all times at altitudes of:

  • 1000 km

  • 500 km

How much difference does this extra aperture make at 1000 km? At 500 km?

Now change the elevation at 5 degrees (its a virtual radar, after all!). What happens at 1000 km altitude? What parameter could you change to make things better at 1000 km?

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