1. Development status of the CALIPSO lidar
IPSL = Institut Pierre Simon Laplace, Universite Pierre et Marie Curie
Gary Wilson
Ball Aerospace and Technologies Corp.

2. CALIPSO is a pathfinder for the GTWS mission
Flight-qualified Nd:YAG lasers demonstrated to 2109 pulses with active Q-Switch and KTP doubler
Lightweight laser beam expanders with anti-feedback provision
1-m beryllium telescope (Goodrich Danbury)
Flight-qualified PMT and APD detectors with low-noise preamps
High-speed space qualified analog-to-digital converters
Powerful, flight-qualified computer with fault tolerance (PowerPC™ 603R)
Auxiliary instruments for context imaging: Wide-field Camera (WFC) and Imaging Infrared Radiometer (IIR)

3. The payload includes three instruments
Telescope Sunshade
Wide Field Camera
X-Band Antenna
Star Tracker Assembly
X-Band Transmitter
Payload Controller
Laser Electronics Unit
Imaging Infrared
Radiometer
Lidar Receiver Electronics
Integrated Lidar Transmitter
Receiver Power Supply

4. Monolithic optical bench is kinematically mounted to Proteus platform
Lidar Instrument Core
Adjustable Boresight Mechanism
APD
PMTs
Laser Radiator
Optical Bench
Laser Optics Modules
Telescope
Beam Expander Optics
ILT (Integrated Lidar Transmitter)
ILR (Integrated Lidar Receiver)

5. Color code shows payload integration status
Lidar Instrument Data
Payload Controller
VME
BUS
Integrated Lidar Receiver
Housekeeping
Telemetry
(Housekeeping)
MS-1553
Payload
Processor
Platform Interface
Lidar Receiver
Electronics
GPS PPS
Receiver
Optics
1064
APD
532 //
PMT
Sync Signal
DRS (8)
System
Interface
532 
PMT
Cmd/Status
Shutter/
Depolarizer
Mechanism
Low Voltage
Power Supply
Telescope T0
Integrated Lidar Transmitter
Boresight Mech
ANA (5)
Mechanism &
Heater Control
HLC (6)
BEO
Laser-1
Power
Relay
1064 nm
532 nm
DRS (2)
BEO
Laser-2
BNR (5)
Instrument Data
WFC
Data Formatter/
Mass Memory nm
Energy
Software
12.05, 10.6,
8.65 mm Energy
IIR
Composite Structure
(Housing, Bench,
Lightshade)
X-Band
Transmitter
Legend
PPS – Pulse Per Second
DRS – Digital Relay Status
ANA – Analog Acquisitions
HLC – High Level Commands
BNR – Bus Non Regulated
Filter
Complete
In assembly
In test
Color code:
Science Data System

6. Lidar receiver optical bench is assembled and aligned

7. Lasers & radiator are integrated and flight qualified
Flight lasers (LOMs) & radiator have been qualified and integrated; the electronics unit (LEU, left) is in final qualification test. The LOMs are operated at 110 mJ per pulse at 532 nm and 1064 nm

8. Beam-expander optics (BEO) are delivered and tested
BEO provides 13x (f=0.9) expansion with >98% reflectivity, laser hard coatings, and anti-narcissism features
Beam expander testing and final-alignment performed with matching flight laser

9. Risk-reduction laser provided validation of design and contamination management
2109 pulses demonstrated
Validated contamination-control and hermetic- sealing procedures
Verified KTP doubler operation and life
Established misalignment tolerance
110 mJ per pulse each wavelength
27.9 FWHM bandwidth at 532 nm
8 mm-mrad beam quality
3700:1 polarization purity

10. Receiver telescope and spectral filters are integrated and tested
Beryllium telescope has fast primary and f/4.7 secondary; the unit was aligned in the Ball JWST Large-Optics Test Facility (LOTF)
Thermal-tuned solid etalon provides 42 pm bandpass with 85% throughput; the unit was calibrated with the flight lasers

11. Flight detectors have completed characterization & calibration at Langley
Photomultiplier (PMT)
LITE heritage design
12.8% QE
0.11 fW Hz-½ NEP
2.5 MHz bandwidth
Avalanche Diode (APD)
MOLA heritage design
40% QE
0.004 pW Hz -½ NEP
2.5 MHz bandwidth

12. Flight electronics are complete and in system integration
X-Band (80 Mbps) Transmitter includes matched Nyquist filters to eliminate conflict with the Deep Space Network
The Lidar Receiver Electronics (LRE) and Receiver Power Supply (RPS) were used in flight detector calibration
The Payload Controller is complete including the 480 MIPs computer & 64 Gb memory

13. Adjustable boresight & shutter mechanisms are complete
The shutter-depolarizer mechanism was qualified and installed
The Adjustable Boresight Mechanism (ABM) and launch-locks were qualified and are now being installed on the Lidar Core

14. Wide-Field Camera performance verified in High Accuracy Test Systems (HATS)
Based on CT-633 star tracker
Dark noise <15 e per sample
Linearity <5% departure to full 730 W m-2 sr-1 nm-1 spectral radiance
Bandpass filter nm
Modified to RS-422 serial I/O bus

15. Imaging infrared radiometer is developed by SODERN
Based on Boeing micro- bolometer arrays
Mirror for 2-point calibration
6464 snapshot array
3 spectral channels sequential (8.65, 10.6, m)

16. Composite housing, lightshade and wire harnesses in vac-bake cleaning
Flight wire harness installation prior to vacuum tests
Payload housing showing lightshade (rear) & WFC platform

17. Payload controller and command & control consoles used for SW testing
100% flight-like electronics
Payload Controller Emulator System (PCES), left
Instrumentation Test Operations Console (ITOC), right

18. Payload instrument simulators are complete and in-use
The Payload Simulator (left) was used to verify instrument-to-spacecraft interfaces at Alcatel
High-Fidelity Simulator (right) will be used for spacecraft software development and includes actual instrument computer and flight code

19. Launch planned for 4Q 2004
Instrument delivery to Alcatel facility scheduled for 3Q 2003
Spacecraft delivery to VAFB scheduled for 3Q 2004
Ball & VAFB operations include atmospheric performance testing with cooperative lidars
Launch planned 4Q 2004
Launch with CloudSAT on dual launch adapter fitting (DPAF)
Delta II 7420 launch vehicle
3-m standard fairing