Summer Internship at the Keck Observatory

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Summer Internship at the Keck Observatory

• Department Software

Mentors Erik Johansson Al Honey
Cameron Lewis
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Overview of Projects

• STRAP control system
• JStamp (real-time Java chip)
• EDAS (Ethernet Data Acquisition System)
• NIRC2 log processing

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S.T.R.A.P.

• What is it?
• System for Tip/Tilt Removal with Avalanche
  Photo-diodes
• Commercially built sensor and control unit for
  the adaptive optics system.
• Designed for ESO but currently being adapted for
  Keck AO system
• Made in Italy

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The STRAP Control System

• Currently Obsolete console interface on a
  windows laptop.
• Soon Integrated EPICS-based control system to
  allow high speed, efficient access to the STRAP
  unit.

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STRAP Control System - Layers
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Strap Control System - Construction
GNU C Compiling in XEmacs
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Strap Control System Construction
Capfast Ultra-advanced design? Or in need of
screen refresh?
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Strap Control System Construction
Capfast After I found the magic Screen Redraw
command
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Strap Control System Construction
DM Screen Editor
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Summary of STRAP Project

• STRAP is nearly ready for mainstream science use.
• Control system is almost complete it will be
  tested with the STRAP unit on the summit
  tomorrow.
• The new system will soon be providing efficient
  control capabilities for STRAP devices wherever
  EPICS is used!

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JStamp Microcontroller
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JStamp Microcontroller

• Got JStamp up and running successfully
• Tested Jtag I/O, serial I/O
• Wrote a JStamp setup tutorial to supplement aJile
  Systems online examples.

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EDAS
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EDAS

• Ethernet Data Acquisition System
• Allows for remote sensing/output of data via a
  standard ethernet interface
• Tested
• All Digital Inputs/Outputs work
• All Analog Inputs/Outputs work
• System accessible over the ethernet

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NIRC2 Log Processing
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NIRC2 Log Processing

• Need a means of determining the causes/times in
  which NIRC2 stall faults occur
• Must determine whether or not the failures are
  getting worse or are remaining constant
• Results will be used to determine if NIRC2 needs
  to be repaired

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Log Processing Procedure

• Start with 1-3 million line log files
• Build flexible, command-line C program to extract
  relevant log entries to a new file
• Incorporate a smart entry repetition removal
  routine and generate stall-fault statistics
• Create appropriate data analysis tables and
  supporting graphs to demonstrate the stall trends

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NIRC2 Log Processing Results
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NIRC2 Log Processing Results
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NIRC2 Log Processing Results