Dispersion Delay Calculator

Calculates the delay experienced by signals of different frequencies from a pulsar given its dispersion measure (DM).

Default values are for Vela (J0835-4510) @ 408 MHz and 2.4 MHz bandwidth (typical RTL2832 dongle bandwidth used in radio astronomy applications).

Use the drop menus provided to set to common centre frequencies/bandwidths and the DM value for the three most popular targets for amateur observers. (Note: other values can be entered directly).

Centre Frequency (MHz):           Set Centre Frequency:

Channel Bandwidth (MHz):        Set Channel Bandwidth:

Dispersion Measure (DM):         Set DM for Pulsar:

   The delay (ms) across the bandwidth is: