Real-time Software

September 22, 2009GONG H-alpha Review2 Outline Platform Development Tools Applications Analysis Summary

September 22, 2009GONG H-alpha Review3 Platform CentOS version 5.3 –Equivalent to Red Hat Enterprise but FREE –Easy to Install and Apply Updates –Chose GNOME Desktop for ease of GTK support –Caveats: Had to use 32-bit NON-PAE (Physical Address Extensions) version of CentOS due to Camera’s limited Linux driver support. 64-bit versions of the drivers are “on their way”

September 22, 2009GONG H-alpha Review4 Platform - continued Drivers… –Model 4000AM-CL DVC (Digital Video Co.) Camera plus EDT (Engineering Design Team) Pro Camera-Link interface card drivers Good set of examples for using camera interface Decent technical support –Model TSYNC PCIe Precision Timing Board drivers Rich support for various Operating Systems Ease of interfacing to driver Great, proactive, technical support

September 22, 2009GONG H-alpha Review5 Development Tools Eclipse Galileo Version (v3.5) Integrated Development Environment (IDE) –Subversive v2.0 Plug-in GTK+ version 2.12 IRAF version 2.14 SAO Image / DS9 Subversion (version control software) GCC v4.1.2

September 22, 2009GONG H-alpha Review6 Development Tools - cont’d OpenJPEG v1.3 (JPEG 2000 open source) –Created JPACK / JUNPACK (FITS to J2K) CFITSIO (FITS file support) TCL/TK v8.4 –BLT v2.4z (Graphical TK widgets) GLADE v (Window Prototyping) RSYNC v2.6.8 (Secured File Transfers) –1024-bit encryption

September 22, 2009GONG H-alpha Review7 Applications Design considerations... – Targets an Object Oriented approach: Applications compiled as C++ executables Provide wrappers around C - based Camera and Timing Board driver functions –Shared Memory and Inter-Process Communication (IPC) for future enhancements (i.e. Real-Time Linux). –GUI based interface (CamVIEW) for Preventative Maintenance Team Support.

September 22, 2009GONG H-alpha Review8 Applications - cont’d H  Suite… –The Core set of applications/tasks: Frame Grabber (haCamera) –Communicates w/ DVC Camera Clock Task (haClock) –Generates Interrupt Based Signal for Camera Snapshot Image Processor (haProcessImage) –Dark, Flat-Field, Normalize, Compress, SSH Image Instrument State (haInstComm) –TCL/TK communication to query Instrument Computer –CamVIEW (in-house developed package) Graphical Management Utility

September 22, 2009GONG H-alpha Review9

September 22, 2009GONG H-alpha Review10

September 22, 2009GONG H-alpha Review11

September 22, 2009GONG H-alpha Review12

September 22, 2009GONG H-alpha Review13 Analysis Compression –Analyzed various compression techniques, so far the front-runner being JPEG 2000 (next being FPACK) Created custom utilities (JPACK/JUNPACK) –Best compression is 1.5Mbytes w/ noise of ~6 ADU (Analog to Digital Units) which is better than the camera noise. Timing –System at Tucson Farm takes ~ 7 seconds of processing before pushing the image to DMAC 2 seconds for Image Capture + 2 seconds for Darks/Flats + 3 seconds for Compression.

September 22, 2009GONG H-alpha Review14 Summary Status... –One remaining issue is finding an adequate tradeoff between compression scheme versus bandwidth requirements. –Overall development environment stable with minimal issues. The hard part of finding the right combo of O.S., drivers, and hardware is now behind us. Future Plans... –64-Bit Operating System upgrade Depends upon Camera and Clock Driver availability from vendors. –Real-Time Linux –Better compression techniques / tools –Improved site bandwidth –Transfer of archived image data from sites to Tucson (i.e. Tape Drives) Demo…