Omega dataset available on PSA until today B. Gondet (Ω/MEX) MEx orbit: T = 6.5 hrs ~ 100 orbits /...
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Transcript of Omega dataset available on PSA until today B. Gondet (Ω/MEX) MEx orbit: T = 6.5 hrs ~ 100 orbits /...
Omega dataset available on PSA until today
B. Gondet (Ω/MEX)
MEx orbit: T = 6.5 hrs~ 100 orbits / month~ 5500 orbitsVariety of local timesOMEGA has operated over ~1300 orbits
Omega dataset available on PSA until today
B. Gondet (Ω/MEX)
Orbit number from 6 to 2526January 2004 to december 2005
Mission startLs=330°
End of the datasetLs=350°
OMEGA dataset: 662 orbits covering one Martian year, from N mid-winter (Ls=330) to N mid-winter (Ls=350)
N spring N summer N fall N winter
Solar conjunction
Marsis antennadeployment mission start
Global coverage
High resolution coverage
Sun elevationi < 0°
0 < i < 15°15° < i <30°
I > 30°
Per
icen
ter
latit
ude
Orbit number
52 orbits over the south pole
Ls (°)
Orb
it’s
num
ber
204 orbits over the north pole
Ls (°)
Orb
it’s
num
ber
swath width mode altitude
16 high res. < 300 km
32 medium/high res.
300 km 950km
64 global mapping 950 km 1550 km
128 global mapping 1550 km – 4000 km
OMEGA scanning modes
swath width mode altitude
16 high res. (~ 300m) < 300 km
32 medium/high res. 300 km 950km
64 global mapping 950 km 1550 km
128 global mapping (2 – 5 km) 1550 km – 4000 km
OMEGA scanning modes
OMEGA naming convention
ORBnnnn_x.QUB data cubeORBnnnn_x.NAV navigation associated
nnnn = orbit numberx = cube number (from 0 to j)
(one cube per mode but also one cube per integration time)
OMEGA baseline pointing mode
Nadir pointing (typical mode SEA > 5°)
with cross-track offsets
Orbit 61
Orbit 61
Orbits 600-610
Orbits 900-910
Special observations
LIMBSEPFPhobos
surface + limb
AB
C
A-B: surface mapping
B-C: atmospheric mapping
α
α < ~ 30 °
S/C: 3 axis stabilized
Special observations: limbs
313 observations
Fixed targeted areas (point tracking, or EPF)
ABC
Special observations : EPF
orbit date Ls (°) Longitude(E) latitude 604 10/07/04 59. 180. 0.
1639 26/04/05 200. 165. 25N 2008 08/08/05 265. 70. 48.5S Hellas 2139 13/09/05 286. 260. 85S PS 2219 06/10/05 301. 84.6 74S PS
orbit # distance (km) px size (m) phase angle ( °)
756_0 149 170 m 62.6
413_0 1882 2200 m 47.2
Special observations : Phobos
Observations examples
spectra examples
Longitude : 354.5-354.75 Latitude : 5.55S-4.45S
Albedo (1.3µm)
Hydratationcriterion
slopecriterion
Associated spectrum
Longitude : 354.5-354.75 Latitude : 5.55S-4.45S
Albedo (1.3µm)
Hydratationcriterion
slopecriterion
Associated spectrumHRSC
Longitude : 354.5-354.75 Latitude : 5.55S-4.45S
Albedo (1.3µm)
Hydratationcriterion
slopecriterion
Associated spectra HRSC