Next: Young Energetic pulsars Up: A Tutorial on Radio Previous: The population of millisecond . Assuming a thin-screen model, calculate the apparent angular diameter of the Crab pulsar at 600 MHz. Assume that the apparent angular diameter = 100mas at 100 MHz. Calculate the apparent angular diameter at 600 MHz if the screen is located at 1% of the distance from the pulsar to the Earth. ... Calculate the parallax's for pulsars with distances of 100, 500, 1000, 5000, 10000 parsecs. ...