Aircraft and balloon versions of the MLS experiments were also developed prior to the space experiments, and are still continuing. The MLS experiments are led by the California Institute of Technology Jet Propulsion Laboratory . The University of Edinburgh Meteorology Department is part of the MLS team and contributes to the data processing algorithms and scientific analyses.
Many collaborations exist with groups throughout the world for scientific analyses of the data.
Heriot-Watt University and Rutherford Appleton Laboratory in the UK contributed to the UARS MLS instrument. The JPL Molecular Spectroscopy Team and collaborators provide major support to MLS for spectroscopic data. MLS, UARS and EOS are part of NASA's Mission to Planet Earth . UARS MLS atmospheric observations started on 19 September 1991, within one week of launch. MLS antenna scan problems and sharing the limited UARS power available among the various instruments caused measurements to become intermittant after 1994.