Kermit Electronics & Software
Kermit operates the Rockwell Hawaii 2
array in 32-channel readout mode. To handle the barrage of data
coming from this massive array, we utilize an array of 8 four-channel
infrared coadder boards, built by Bob Leach at Astronomical Research
Cameras of San Diego. Each quadrant of the array is handled by two
adjacent coadder cards. The Leach electronics are connected with the
control computer (a Sun UltraSparc 10 named "sauron") via a 50 Mbps
fiber optic line.
The Motorola 56001 DSP code running on
the Leach readout boards was modified and upgraded to handle the
Hawaii 2 array by Mike Trumpis, with contributions by Marshall Perrin
and Jamie Lloyd.
The control software was written by Marshall
Perrin, and is based directly upon the control software for IRCAL at Lick Observatory, by Jamie Lloyd
and Scott Severson. It uses the Music message passing library
originally developed by UCO/Lick and Keck Observatories. The main
components are "leachd", a C daemon which interfaces with the Leach
electronics box, and "kermitui", which is a Tcl/Tk GUI and high-level
control program. Quick-look data analysis is performed in IDL
The software source code may be found here, while the user manual is here.
See also the SDSU Controller User's
This page last updated June 26, 2003,
by Marshall Perrin