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CALIPSO Space-Qualified Hardware for the CALIPSO Lidar Ron Schwiesow Ball Aerospace and Technologies Corp. Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations 1 CALIPSO is a pathfinder for the GTWS mission Lidar Working Group 18Jul02 CALIPSO Flight-qualified Nd:YAG lasers demonstrated to 2109 pulses Laser beam expanders with anti-feedback provision 1-m beryllium telescope (OCA/Corning) Flight-qualified PMT and APD detectors with associated preamps High-speed digitizer Powerful, flight-qualified computer with fault tolerance (General Dynamics PowerPC™ 603R) Auxiliary instruments for context imaging (Wide-field Camera and Imaging Infrared Radiometer) Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations 2 The payload includes 3 instruments Star Tracker Assembly X-Band Antenna Telescope Sunshade Wide Field Camera Imaging Infrared Radiometer Integrated Lidar Transmitter Lidar Working Group 18Jul02 CALIPSO Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations 3 The payload includes 3 instruments CALIPSO Wide Field Camera Platform Electrical Interface Bracket Star Tracker Assembly X-Band Transmitter Payload Controller Laser Electronics Unit Lidar Receiver Electronics Receiver Power Supply Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations 4 Monolithic optical bench supports the lidar CALIPSO Lidar Instrument Core Active Boresight Mechanism APD PMTs Laser Radiator Optical Bench Laser Optics Modules Telescope Beam Expander Optics ILT (Integrated Lidar Transmitter) Lidar Working Group 18Jul02 ILR (Integrated Lidar Receiver) Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations 5 Risk-reduction laser proved concept CALIPSO 2109 pulses demonstrated validated contaminationcontrol procedures verified KTP doubler operation established misalignment tolerance showed benefits of derated components Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations 6 Laser optics modules are tested and delivered Flight Laser #1 in Sealed Canister Lidar Working Group 18Jul02 CALIPSO Flight Laser #2 Prior to Lid Closure Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations 7 Laser burn-in is part of the qualification process Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations CALIPSO 8 Beam-expander optics are delivered and tested CALIPSO All-reflective design Mounts to laser optics module Beam expansion 13x f/1.4 primary mirror >0.98 reflectivity at 532 and 1064 nm Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations 9 Laser vibration test is done with mass model of beam expander Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations CALIPSO 10 Laser functional test verifies performance CALIPSO 110 mJ each wavelength 20.25-Hz PRF 25-pm linewidth at 532 nm 6-8 mm-mrad beam quality polarization purity 3700:1 Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations 11 All-beryllium telescope has fast primary and f/4.7 secondary Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations CALIPSO 12 Tested telescope assembly has been delivered from vendor Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations CALIPSO 13 First fold mirror assembly includes field stop and flexure mounts Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations CALIPSO 14 Refractive collimator and flexure mounts tested as a subassembly Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations CALIPSO 15 Dichroics, mirrors, and polarizing beamsplitter tested separately Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations CALIPSO 16 Sandwich etalon filter for 532 nm provides good optical performance Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations CALIPSO 17 Sandwich etalon passed thermal and mechanical qualification CALIPSO Housing provides thermal stabilization and uniformity Etalon polished to approximate wavelength, angle-tuned to precise wavelength, thermal tuned to track changes Bandpass 42 pm Peak transmission >0.81 Contrast ratio >160 Birefringence <0.001 crosstalk Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations 18 Flight APD includes preamp and stabilization circuitry CALIPSO Based on MOLA design QE 0.40 Noise 0.004 pW Hz-½ Bandwidth 4 MHz Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations 19 Cabling mockup prepares for final integration and test Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations CALIPSO 20 Structures include optics bench, sunshade, and housing Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations CALIPSO 21 Composite structure is assembled for testing Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations CALIPSO 22 The composite structure is qualified with mass models in place CALIPSO Structure includes sunshade Components mounted to outside of payload housing Optical bench floats inside housing Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations 23 Optical bench is a monolithic composite structure Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations CALIPSO 24 Optical bench is also tested with mass models of components Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations CALIPSO 25 Wide-field camera is based on standard CT-633 star tracker CALIPSO – Longer lens, narrower FOV than CT-633 – Neutral density filter with full aperture – Bandpass filter 620 - 670 nm – 512x512 CCD as push-broom scanner – RS-422 synchronous serial I/O Standard CT-633 Flight PWAs Flt Lens Assembly Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations 26 Imaging infrared radiometer is developed by SODERN Based on Boeing microbolometer arrays Mirror for 2-point calibration 6464 snapshot array 3 spectral channels sequential CALIPSO Mirror Mechanism EM Flight Infrared Sensor Module (IASI) Lidar Working Group 18Jul02 Housing Structure Eng Model Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations 27 Payload Simulator CALIPSO Allows testing of interface to spacecraft platform Currently in service at Alcatel in France Lidar Working Group 18Jul02 Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations 28 Launch planned for April04 Lidar Working Group 18Jul02 CALIPSO Dual launch with CloudSat on dual launch adapter fitting Delta II 7420 launch vehicle 3-m standard fairing Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations 29