IN THE PROPOSED WORK WE USE WIND DATA TO ANALYZE PREDOMINANTLY SOLAR WIND TRANSIENTS AT 1 AU AND HOW THEY AFFECT THE MAGNETOSPHERE INCLUDING THE GEOMAGNETIC TAIL. WE SPLIT THE INVESTIGATION INTO 2 PARTS. (I) SOLAR WIND TRANSIENTS AT 1 AU LARGE OR SMALL WHERE WE ADDRESS AMONG OTHERS THE FOLLOWING SCIENCE THEMES: (I) INTERACTION OF LARGE-AMPLITUDE ALFVEN WAVES WITH A MAGNETIC CLOUD OF UNUSUAL ORIENTATION INCLUDING INTERMITTENT EROSION OF THE CLOUD S FRONT BOUNDARY. WE USE NEW WIND DATA PRODUCTS ON ELECTRON VELOCITY DISTRIBUTION FUNCTIONS. (II) SMALL SOLAR WIND FLUX ROPES (SFRS): (A) THEIR MODELING DURING SOLAR CYCLE MINIMUM CONDITIONS AND (B) IN VIEW OF THEIR HIGH TWIST INQUIRE WHETHER THEY ARE KINK STABLE. (III) INSIGHTS GAINED ON THE PROPAGATION OF ICMES IN THE INNER HELIOSPHERE FROM MAGNETIC CONJUNCTIONS OF WIND WITH MESSENGER. (II) ASPECTS OF THE INTERACTION OF THE TRANSIENTS WITH THE MAGNETOSPHERE: (I) A SPECIFIC EFFECT ON THE MAGNETOSPHERE BOUNDARY LAYER CAUSED BY SHOCKS PROPAGATING IN CMES WHEREIN THE MAGNETOSHEATH FIELD BECOMES STRONGER THAN THE MAGNETOSPHERIC FIELD ON THE DAYSIDE. (II) GEOEFFECTS ELICITED BY SMALL SOLAR WIND TRANSIENTS (STS) PARTICULARLY THOSE WHICH DEPEND ON THE LOW ALFVEN MACH NUMBER OF STS. (III) A FLUX ROPE STRUCTURE SEEN BY WIND IN THE DISTANT TAIL AND PRECEDING AN INTERVAL OF TAIL ACTIVITY. WE RELATE THIS TO SYSTEM-WIDE DISTURBANCES IN THE MAGNETOSPHERE. (IV) WITH WIND AS MONITOR OF INTERPLANETARY CONDITIONS EXTEND OUR UNDERSTANDING OF CRATER FLUX TRANSFER EVENTS AS STRUCTURES WHICH RETAIN A CONNECTION TO AN ACTIVE X-LINE USING THE CONSIDERABLE KNOWLEDGE GAINED ON RECONNECTION DIFFUSION REGIONS FROM STUDIES BY THE MAGNETOSPHERE MULTISCALE (MMS) MISSION. THROUGHOUT WE WILL TAKE ALL OPPORTUNITIES TO USE WIND OBSERVATIONS IN CONJUNCTION WITH MMS STUDIES OF THE RECONNECTION REGIONS ON THE DAYSIDE AND IN THE TAIL. WE ALSO SEEK SYNERGY STUDIES WITH THE PARKER SOLAR PROBE. THE PROPOSED WORK WILL ENHANCE THE SCIENTIFIC RETURNS OF THE WIND MISSION.