Upcoming Events …
& Other Stuff
January 2013 – June 2013
Shawn M. Brooks – UVIS Investigation Scientist
UVIS Team Meeting
Orlando, Florida
7-9 January 2013
Tour Status
• Sequence S76 will finish executing on 13 January
(early afternoon EST).
• Rev 179 starts on Sunday, 12 January:
–
–
–
–
–
–
period = 13.3 days
inclination = 53.0˚
eccentricity = 0.???
periapse = 7.44 Rsaturn; apoapse = 28.45 RSaturn
T88 occurred November 29
T89 will occur February 17; R4 is on March 9
• During the next 6 months, we will:
– Reach maximum inclination for the IN-1 phase; slightly higher
inclinations achieved in IN-2
XXM Tour Timeline
Saturn, Ring Solar Occultations
• Saturn
Rev 178
ingress – 68.25° S
Jan 04 (DOY 004) UVIS prime
• Rings
egress
Feb 13 (DOY 044) VIMS prime
Rev 181
• Saturn
Rev 187
ingress – 67.87° S
Apr 21 (DOY 111)
• Saturn
Rev 188
ingress – 67.41° S
May 01 (DOY 121) UVIS PIE
• Saturn
Rev 192
ingress – 58.80° S
Jun 12 (DOY 163) UVIS prime
(G ring, too!)
UVIS PIE
Ring Stellar Occultations
10 UVIS stellar occultations through June 2013:
• q Carinae
revs 186 (CIRS), 190
• R Cassiopeia
revs 185 (VIMS)
• d Centaurus
revs 183, 185, 191, 194 (July 2013)
• b Libra
rev 187
• l Taurus
rev 188
• k Velorum
rev 183
Titan Flybys
January 2013 – June 2013
• T89
Feb 17
1978 km
RSS
UVIS inbound/outbound rider w/CIRS
• T90
Apr 05
1400 km
CIRS/VIMS
UVIS inbound/outbound rider w/CIRS
• T91
May 23
970 km
RADAR
UVIS inbound/outbound rider w/CIRS
• T92
Jul 10
964 km
UVIS inbound rider w/CIRS
RADAR/VIMS
Icy Satellite Flybys
SOST Rev 183 (R4):
- Rhea @ 997 km (Mar 09 2013)
- primarily an RSS gravity flyby
- spacecraft oriented to obtain “ORS drag”
- UVIS riders with CIRS, ISS inbound/outbound
PIES:
Rev 188 –
• UVIS_188DI_ICYEXO001_PIE: Dione occultation of Spica
Rev 192 –
• UVIS_192TE_LOPHASE001_PIE: Tethys low phase albedo mapping
Rev 193 –
• UVIS_193DI_LOPHASE001_PIE: Dione low phase albedo mapping
• UVIS_193MI_LOPHASE001_PIE: Mimas low phase albedo mapping
Rev 194 –
• UVIS_194EN_LOPHASE001_PIE: Enceladus low phase albedo mapping
plus Mimas primes and other riders …
Additional High-Priority UVIS
Observations
• Auroral stares, slews:
revs 178(2), 179, 181,
182(2), 183, 184(4), 187(5), 188, 190(5), 192, 193(3)
• Saturn EUVFUV: revs 189, 194 … followed by 18
Saturn EUVFUVs comprising the West CAKEs in
revs 194, 195 &196 (July, August 2013)
• And five RINGMAPs during revs 185, 186, 187, 189
and 191
S77 UVIS SPASS (DsOY 013–085)
S78 UVIS SPASS (DsOY 085–158)
Proximal / F Ring Orbit Planning
• With the (successful!) senior review behind
us, the Project has turned its focus back on F
ring and proximal orbit planning.
• At the October PSG the DWGs were asked
to provide lists of science observations at:
– periapse ±1 hour
– 12 ‒ 1 hour before/after periapse
– >12 hours before/after periapse.
• These lists will be used by SPST to derive an
integration and implementation strategy for
these orbits.
Proximal / F Ring Orbit Planning
• It is not clear to me how carefully these
boundaries were selected or considered by all.
• Will the 2-hour range centered on periapse be
useful for ORS instruments?
– Target motion compensation could be an issue.
from E. Manor-Chapman
from E. Manor-Chapman
Proximal / F Ring Orbit Planning
• It is not clear to me how carefully these
boundaries were selected or considered by all.
• Will the 2-hour range centered on periapse be
useful for ORS instruments?
– Target motion compensation could be an issue.
– According to Mission Planning, there is reason to believe
we can track during this period.
• The D ring dust hazard has been revised:
– The eye of the needle to be threaded is narrower.
from D. Seal
from D. Seal
from D. Seal
from D. Seal
Proximal / F Ring Orbit Planning
• It is not clear to me how carefully these
boundaries were selected or considered by all.
• Will the 2-hour range centered on periapse be
useful for ORS instruments?
– Target motion compensation could be an issue.
– According to Mission Planning, there is reason to believe
we can track during this period.
• The D ring dust hazard has been revised:
– The eye of the needle to be threaded is narrower.
– Mission Planning recommends HGA to Ram for 12
periapses!!!
– We must accept higher risk or implement a strategy to
preserve science. (PMBs?)
Summary
• Spring 2013 will be a busy one for UVIS,
particularly with respect to the Saturn and
Rings disciplines.
• S78 (T90, T91) implementation is well under
way. S79 kicks off next week.
• Behind the scenes work on the proximal and
F ring orbits has begun. High-level planning
has begun.
• Start thinking quantitatively about your F
ring/proximal science!
• More at the February 2013 PSG …