Run UDM on Linux: from the supplied USB flash drive or the web location: http://unihedron.com/projects/darksky/cd/udm/ Extract file udm_1.0.0.xxx.tgz to a directory of your choice. cd into that directory. type: ./udm Filename: sdf1.0_3.pdf Description: Definition of the standard data format for skyglow observations Version 1.0 September 20, 2012 Directory: tzdataYYYYn.tar.gz Description: Contains the files that UDM uses for timezones. Go to http://www.iana.org/time-zones for updates to this file. This file is already included in the individual UDM OS packages, but available here for people that need the source code. Unpack the files from here and place into a subdirectory in the UDM source directory called: tzdatabase Must be accessible when making Debian file (sudo make deb). Directory: firmware.tar.gz Description: Contains the firmware for various Unihedron products. This is already included in the individual UDM OS packages, but available here for people that need the source code. Unpack the files from here and place into a subdirectory in the UDM source directory called firmware . Must be accessible when making Debian file (sudo make deb). Lazarus also needs lazopenglcontext, install as follows: package->Install/Uninstall packages->Available for installation->lazopenglcontext->Save and rebuild IDE