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	time (NRT) directly fromthe EOFfor about8 hours a day. Scientists,frombehind their workstations, can retargetand repro- gramtheir experimentsin a matter of minutesin response to eventson the Sun. We expectthisfacility to be used morefre- quently assolar activity increases. SOHO coordinated observations, now and in a new missionSOHOwas designed so that there would be significant coordina- tion between the onboard instrumentsand between SOHO and ground based instruments.Coordinated observationscome in various scales and formats. The largest campaigns are world-wide, multi-site, coordinated efforts of ground based observatories (GBO's),SOHOexperiments,andotherspacecraft,suchasYohkoh,Ulysses,WIND,POLAR,GEOTAIL,andSAMPEX. These campaigns are most often coordinated from the SOHO EOF at Goddard, with instantaneous exchange of observing plans, schedules, targets, and quicklook data, via the SOHO Web pages. One example is IACG campaign # 3,the "CME Onset Study", which has been run three times in the fall of 1996 (cf. http://sohowww.nascom.nasa.gov/operations/campaigns/soho/iacg3_a.txt)

_.

Smaller,more informalcollaborationsbetween SOHOexperiments,a few GBO's,and oftenYohkoh-SXT, arerun routinely

severaltimesa week. Again,the long-termplanning,aswellasreal-time coordination,is almostexclusively done fromthe

SOHO EOF.There arealso frequentintercalibrationsbetween the SOHOexperiments,occasionally supported with rocket

underflights, and sometimes using well-calibrated stars as they passnear the Sun.

Asof April7, 1997,after about1 year of science operations,the SOHO Campaign Catalog documents211 campaign entries (including intercalibrations, and SOHO only collaborations), of which over 100 include GBO's, and more than 80 Yohkoh-SXT. SOHO campaigns vary in duration from 1 hour to severalhours a day for more than a week. Typically 4 to 12 hours per day are devotedto jointobservationsof some sort. The SOHO Campaign Catalog, aspartof theSOHO Archive,isfreely accessible through the Web, and is also updated, in a controlled manner, through Web pages. Many oftheSOHO coordinated observing sequenceshave beenwrittenup asso-called JointObserving Programs(JOPs), whichdescribethescientificbackgroundandgoalsoftheprogram,andthedetailedobservingsequencesforeachSOHO experiment, often also for outside participants. Many JOPs are executed regularly, and the observing sequences are refined, and the JOP description updated, after several runs. So far there are 62 scientific and 11 intercalibration JOPs. JOP descriptions too areaccessible via the SOHOPages)http://sohowww.nascom.nasa.gov/operations/JOPs/),andthe JOP descriptionsforman integralpartof the SOHO archive. The SOHO Calendar and SOHO JOPs have become a point of reference for Solar observatories worldwide, and for other solar missions, while the SOHO EOF has clearly established itself as a world center for coordination of solar observations. In the new mission this role will be maintained and even strengthened, as observations become more event-driven -- and thus require more coordination -- with the increase in magnetic activity in the rising cycle,and astwo new NASA missions, TRACE and ACE, will share the EOF facilities, and SOHO planning infra-structure. TRACE science planning and analysis software will in fact be meshed with SOHO's. ACE, designed like SOHO to operate from an L1 halo orbit, will be commanded from the same Mission OperationsRoom (MOR) asSOHO. In the new mission SOHO will continue to serve the community by providingground based observers the opportunity for joint observationsfor any scientifically sound observing proposal.New ground-based observing facilities, such asthe new French- Italian vector magnetograph THEMIS, the HAO Advanced Coronal Observing System, and NSO's SOLIS suite of instruments will become fully operational during the period of the proposed SOHO Solar Maximum Science program, and will benefit from collaboration with severalof the SOHO instruments. Data Access The expense and extent of the SOHO mission cannot be justified if only the PI teams have access to the data obtained with the instruments. Likewise, the PI teams' efforts cannot be justified if they do not have well-defined access to the first results of their labors. The SOHO data accesssystem was designed to balance these considerations. Web and summary (KP) dataThe SOHOteamhasmadeaseriouseffortto makeourdataavailable to asmany peopleas possible.The information described here isavailable to the world via our Web pages.Daily imagesofthe Sun (the imaging instruments' summary data contributions) and frequentupdatesto solar wind parametersare available via the Web assoon as they arereceived.(Morefrequentimagesare availablevia theLASCO andEIT Webpages.) The particleexperiments' key Proposal forSOHO SolarMaximum Science Program-19