DXL (DIFFUSE X-RAYS FROM THE LOCAL GALAXY) IS A SOUNDING ROCKET MISSION FOR THE STUDY OF THE LOCAL HOT BUBBLE (LHB) AND SOLAR WIND CHARGE EXCHANGE (SWCX). DXL HAS BEEN SUCCESSFULLY LAUNCHED TWICE FROM WHITE SANDS MISSILE RANGE MEASURING THE COMPOUND CROSS SECTION OF SWCX WITH NEUTRAL HE AND QUANTIFYING THE RELATIVE CONTRIBUTION OF LHB AND SWCX TO THE ROSAT R1-R7 BANDS AND WISCONSIN C B AND BE BANDS. PREPARATION FOR A THIRD LAUNCH FROM POKER FLAT AK IS WELL UNDERWAY WITH AN EXPECTED LAUNCH DATE OF JANUARY/FEBRUARY 2018. THE PRIMARY FOCUS OF THE LAUNCH IS TO MEASURE THE COMPOUND CROSS SECTION WITH NEUTRAL H BY STUDYING THE SPATIAL SIGNATURE OF THE SWCX FROM EARTH S CUSPS IN ORDER TO COMPLETE THE DXL CHARACTERIZATION OF LHB AND SWCX AT ROSAT S ENERGY RESOLUTION.DUE TO DAMAGE TO THE PAYLOAD DURING REENTRY OF FLIGHT #2 IN 2016 LAUNCH #3 HAD TO BE POSTPONED BY 1 YEAR. IN IN AGREEMENT WITH NASA HQS AVAILABLE FUNDS WERE USED TO REFURBISH THE DAMAGED PAYLOAD AND THE DXL MISSION IS CURRENTLY FUNDED TO SUPPORT PAYLOAD REFURBISHING CALIBRATION AND TM HANDSHAKE BUT NOT INTEGRATION LAUNCH AND POST FLIGHT CALIBRATION AND ANALYSIS. IN THIS PROPOSAL WE REQUEST SUPPORT FOR THE DXL INTEGRATION LAUNCH AND POST-FLIGHT CALIBRATION AND ANALYSIS. DURING THE FIRST TWO DXL CAMPAIGNS A NEW CLASS OF INSTRUMENTS USING MICROPOROUS OPTICS WAS ALSO INTEGRATED AND SUCCESSFULLY TESTED IN FLIGHT USING A MICRO-CHANNEL PLATE. PREPARATION FOR THE DXL SUCCESSOR WHICH WILL INTEGRATE LONGER FOCAL LENGTH MICROPOROUS OPTICS WITH A CCD CAMERA TO STUDY GALACTIC DIFFUSE EMISSION AT CCD RESOLUTION HAVE ALREADY BEGUN. IN THIS PROPOSAL WE ALSO REQUEST SEED FUNDS TO BEGIN WORK ON THE DXL HEIR (DXG DIFFUSE X-RAYS FROM THE GALAXY) COMBINING MICROPOROUS OPTICS WITH CCD DETECTORS WITH FOCUS ON THE CHARACTERIZATION OF THE OPTICS. IN ADDITION TO THE TECHNOLOGICAL DEVELOPMENT OF THE MICROPOROUS OPTICS FOR ASTROPHYSICS APPLICATIONS THE SCIENTIFIC GOAL OF DXG IS TO STUDY THE PROPERTIES OF THE DIFFUSE X-RAY EMISSION FROM LHB AND SWCX TO THE GALACTIC HALO.