Multimedia

The GLAMR sphere calibration as viewed by a Go-Pro. The sphere is illuminated with light from the laser tables from about 400 to 960nm. The GLAMR transfer radiometers sit at the exit port of the sphere, recording the absolute radiance generated by the GLAMR system.

OLAF2 being expertly moved from GSFC Building 5 by our Transportation crew. Since the building does not have a loading dock and OLAF2 does not fit on the truck's lift gate, the delicate optical bench must be lifted by forklift from the ground to the truck.

Notional diagram of the GLAMR measurement set-up. The laser tables need to be in a laser-safe area, but no more that 12m from the sphere. The sphere sits in front of the instrument under test. The data system controls the measurement program, records telemetry, and interfaces with the instrument under test (where possible).

Note that the diagram is not to scale.

Sphere, electronics rack and data server in front of the TVAC chamber at LASP.

Sphere in place in front of the TVAC chamber at LASP. The sphere aperture is aligned with the instrument as close to the chamber as possible (left). A light-tight enclosure is built up to couple the sphere to the window (right).

Transfer Radiometers aligned in front of the integrating sphere exit port for a sphere calibration.

475nm light from the OPO illuminating the sphere with the transfer radiometers at the exit port

Transfer Radiometers in their mounting hardware, added in 2021 to improve repeatability of alignment.

Photo of the GLAMR deployment at LASP for the CLARREO showing hardware, green lasers and software displays.

The GLAMR deployment at LASP for the CLARREO Independent Calibration. Pictured: Brendan McAndrew working at with OLAF-3 and Nick Reed working with the IPG-CLT.

The GLAMR facility deployed at Ball Aerospace for the characterization of Landsat-9 OLI-2

The GLAMR OLAF-2 laser table deployed for the calibration of PACE OCI.

The GLAMR facility deployed at RTN for the characterization of JPSS-3 VIIRS

OLAF-4 laser table deployed at instrument vendor's location

Beam paths through the OPO

Fourth Harmonic Generation on OLAF-2 laser table. Commercial green light (532nm) pump laser excites invisible light (1300nm) which in turn, generates second harmonic in the LBO crystal. The resulting 650nm red light passes through a BiBO crystal which produces invisible 325nm ultraviolet light. The 325nm light can be seen in the lower left as a blueish spot via photoluminescence.

Orange light in the OPO_SWIR_SHG

Red light though the prisms

Barbara Zukowski checking the alignment of a beam on OLAF-1.

Brendan McAndrew configuring the 20" sphere for the GLAMR test of OCI. OCI is inside the TVAC chamber which is behind the black curtain. The chamber window is held in place by the port, visible to the left of the image. An aluminum collar fixed to the port forms a light-tight enclosure with the sphere aperture.

Brendan McAndrew and the GLAMR sphere aligned in front of L'Ralph MVIC.

Joel McCorkel in the lab with the GLAMR sphere in front of the JPSS-2 VIIRS instrument

RSP sitting in front of the 20" sphere for spectral characterization.

The GLAMR sphere aligned with the OLI-2 instrument (inside TVAC chamber) and the two laser systems that generate the wavelengths above 2000nm with Mike Rodriguez.