UTILITY CLASSES

Table 1: Table showing the number of lines of compilable code for implementing GBT device drivers, user programs, and libraries. User Programs include only the code added for the GBT. The Astronomical Libraries are used by the antenna and tracking LO and the Receiver Library is used by the receivers.

Library	number
TimeStamp	764
Sequencer	240
Control	4111
FITS	745
MCBInterface	667
RPC++	1913
headers	582
DeviceAccess	190
SocketClass	268
ConfigIO	509
DynamicLoader	60
IF	2114
Message	2104
monitor	1994
util	592
DataDesc	852

Receivers Library	number
Receiver	1623
Astronomical Library	number
Coords	539
TimeKeeper	764
Scan	3244
StarLink	6514
Device Driver	number
GPIB	811
Mv340	217
Vmi3100	120
Vmi3118	343
z85c30	286
User Program	number
Glish	3887
Tcl/Tk	7394

In addition to the classes described above to implement the four basic functions of the system, there are numerous utility classes used throughout the system (See Table 1).

• classes used as Parameter values which describe dynamic aspects of scans such as antenna movement or frequency changes
• classes for handling dynamic loading of libraries
• classes for emulating radio frequency signals from receiver to backend as manipulated and routed by the electronics and cabling of the system
• classes for encapsulating the interface to device drivers
• classes for specifying and computing times
• classes for the storage and retrieval of system configuration parameters stored on disk
• classes for writing FITS data files