The MAVEN Mission: Exploring Mars Climate History. Bruce Jakosky LASP / University of Colorado
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1 The MAVEN Missin: Explring Mars Climate Histry Bruce Jaksky LASP / University f Clrad
2 Evidence fr Surface Water n Ancient Mars Where Did the Water G? Where Did the CO 2 G? Abundant evidence fr ancient water Vlatiles can be lst t space Vlatiles can g int the crust Carbnate depsits in a Martian meterite Escaping ins detected frm Mars Express
3 MAVEN Will Allw Us t Understand Escape f Atmspheric Gases t Space
4 The Slar Wind is Able t Strip Off Gas frm the Tp f the Atmsphere Vide can be fund at Jaksky, 8 th Mars Cnference
5 The MAVEN Science Instruments: Sun, Slar Wind, Slar Strms SWEA SEP EUV SWIA Neutrals and Ins Plus Evlutin In-Related Prperties and Prcesses IUVS NGIMS STATIC MAG LPW
6 MAVEN s Timing in the Slar Cycle MAVEN Primary Missin MAVEN s primary missin ccurs n the declining phase f the slar cycle, when slar strms are mst intense and mst abundant.
7 The MAVEN Spacecraft Launch (Wet) Mass: 2455 kg at launch Spacecraft Dry Mass: 810 kg at launch Pwer: 1135 W at Mars Aphelin LPW (2) SWEA Electra (behind) SWIA SEP Gull-Wing Slar Arrays MAG (2) SEP Fixed HGA Articulated Paylad Platfrm (IUVS/STATIC/NGIMS)
8 MAVEN Missin Architecture Launched n 18 Nv. 2013, first day f its 20- day launch perid Ten-Mnth Ballistic Cruise t Mars Orbit Insertin: 10 p.m. EDT, 21 Sept 2014 (0200 UTC, 22 Sept. 2014) One Year f Science Operatins Orbit shwn t scale
9 Mars Orbit Insertin MOI Cuntdwn (Hurs) TCM-4 MOI Sequence Activatin TCM-5a Opprtunity TCM-5b Opprtunity Desat Cnfigure fr g-fast Recvery Switch t LGA 40 bps End MOI Phase 35 hr Capture Orbit Incming Trajectry 5.5 hr Orbit 4.5 hr Orbit Periapsis: 550 km Inclinatin: 75 deg MOI MOI will ccur n 9/21/14 (ET) Sequence activates 3 days ut 60-day cmmand mratrium begins July 30 MOI Peer Review, May 1 Critical Events Readiness Review, 21 July MOI #1 ORT between June 3-5 MOI #2 ORT set fr August 5-7 MAVEN CERR - July 21,
10 Cmet Siding Spring s Upcming Encunters with Mars and MAVEN n Octber 19 NEOWISE Image f C/SS Gemetry f Encunter Cmet C/ 2013 A1 Siding Spring (C/SS) discvered in January 2013 Lng-perid cmet n first passage frm Ort Clud Siding Spring will pass ~132,000 km frm Mars n Octber 19 CSS is in a highly inclined, slightly retrgrade rbit Any dust frm CSS that hits MAVEN will have speed f 56 km/s
11 Mdeling The Dust Envirnment At MAVEN And Mars Dust release frm cmet and subsequent trajectries can be mdeled Three grups independently mdeled the distributin f dust particles frm cmet C/ 2013 A1 Siding Spring during its clse apprach t Mars. Mars is at edge f dust clud dust may nt actually impact spacecraft Risk is thught t be relatively small tday pssibly less than backgrund dust Risk nt negligible things can happen that d nt shw up in images r mdels MAVEN will take steps t mitigate risk Phase lcatin in rbit s that Mars shields us during time f peak risk Orient with minimum crss-sectin tward dust ram directin Instruments ff r in safe state Science bservatins planned, assuming smth transitin phase IUVS spectral imaging f cmet 2 days befre encunter Full-science bservatins f upper atmsphere fr ~2 days befre and ~2 days after encunter, t get befre and after views 8
12 MAVEN Particles and Fields: Explring the Slar Wind Beynd 1 A.U. Slar wind data frm MAVEN SWIA (J.S. Halekas) and OMNIWeb (N. Papitashvili), SEP fluxes frm MAVEN SEP (D. Larsn) and ACE EPAM (R. Gld
13 MAVEN s UltraVilet Imaging Spectrgraph (IUVS) Gets Its First View Of Mars MAVEN/IUVS First Mars Spectrum Relative Intensity 190nm Mid-UV wavelength (apprx) 350nm IUVS bservatins f Mars in May, when Mars filled less than ne pixel Mst features are slar spectral lines, reflected frm the planet s atmsphere. 13
14 MAVEN Current Status 241 days int flight as f tday (9 July 2014) 64 days until Mars Orbit Insertin Cruise check-ut f spacecraft and instruments is cmplete Instruments have been cllecting data during cruise; instruments nw ff until after MOI All systems are perating nminally There are lts f events that still need t ccur successfully, but We are n track t carry ut ur science missin as planned!
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