Using the ha= and dec= options allow you to set the rates explicitly in arc seconds per second.
Using ra= option sets the tracking above or below the sidereal rate in arc-seconds per seconds.
The local option adjusts the tracking rate to the value determined by the derivative of the pointing coefficients at the hour angle and declination that the telescope is currently pointing. It cannot be combined with the ra, ha, or dec options. (Use the dra, dha, and ddec options below).
The dra=, dha=, and ddec= options are a bit odd as they add their respective values to the track rate already established on the command line.