IGF::OT::IGF GAS SENSING IN A SPACE ENVIRONMENT IS DIFFICULT. COMMERCIAL OFF THE SHELF COTS DEVICES ARE NOT QUALIFIED TO MEASURE MULTIPLE GAS CONSTITUENTS IN VARIOUS SPACE PLATFORMS. THIS PROJECT PROPOSES TO EXECUTE AN SBIR PHASE III IN PARTNERSHIP WITH THE RECIPIENT TO EVALUATE AND MATURE A HIGH PERFORMANCE INFRARED LASER SENSOR TECHNOLOGY FOR THREE DISTINCT, BUT RELATED PROTOTYPE GAS SENSING ARCHITECTURES. THE TECHNICAL APPROACH COMBINES THE PROVEN HIGH PERFORMANCE OF WAVELENGTH MODULATION SPECTROSCOPY WMS WITH THE LONG WAVELENGTH INTER BAND CASCADE LASER ICL OPTICAL SOURCES, DISTRIBUTED FEEDBACK DFB AND ESTABLISHED VERTICAL CAVITY SURFACE EMITTING LASER VCSEL TECHNOLOGY. THIS PROJECT WILL TAKE LESSONS LEARNED FROM SEVERAL SBIR PHASE I, PHASE II, AND PROGRAM FUNDED PHASE IIE AND III ACTIVITIES INCLUDING THE MULTI GAS MONITOR MGM MAJOR CONSTITUENT TECHNOLOGY DEMONSTRATOR, THE ADVANCED SPACE SUIT PORTABLE LIFE SUPPORT SYSTEM PLSS CO2 SENSOR, AND THE SEVERAL PROJECTS TARGETING COMBUSTION PRODUCT MONITORING. THE LONG TERM GOAL WILL BE TO EVENTUALLY ADVANCE EACH PLATFORM TO A STAGE WHEREBY IT CAN BE POISED FOR INCORPORATION INTO A FLIGHT DEMONSTRATOR FOR EACH NASA PROGRAM, NAMELY THE AES ADVANCED PLSS APLSS GAS SENSOR, THE IN FLIGHT CONTINGENCY MONITOR IFCM FOR ORION, AND THE POST LANDING CONTINGENCY MONITOR PLCM FOR ORION. THIS PROJECT WILL BE A 9 MONTH EFFORT THAT INITIATES THE GOALS IN 2015 ONLY. ALL DEVICES WILL BE INITIATED SIMULTANEOUSLY BASED ON SIMILAR OPTICAL DETECTION TECHNIQUES AND UTILIZING A CORE ELECTRONICS ARCHITECTURE THAT WILL BE RADIATION TOLERANT.