Waves from Quantitative Analysisof Specular Reflections from

Jingpo Lacus and Kraken Mare

Jason W. BarnesDepartment of PhysicsUniversity of Idaho

The T58 Specular Sequence

Specular Geometry Calculation

Overview Map

SouthwesternJingpoLacusMap

Lake Powell from seat 3D UA 306 LAX-BWICirca 12:38 Local Solar TimeImages ~10s apart(Delta-Phase_Angle between images ~250m/s*10s / 10km ~10 degRalph Lorenz

Effect of Waves on Specular Solar Image

The T58 Data, Compressed

SpecularFootprintsw/waves

FitQuality

T59

T59 Photometric Lightcurve

T59

Conclusions

•T58 4-point lightcurve allows us to place an upper limit of 0.2o on the waves present at southwestern Jingbo Lacus•T59 15-point, but less spectacular, lightcurve gives the first possible hints of wave activity on Titan – either changing wind activity or very-long-wavelength waves (but could still be clouds)•Future high-cadence observations with points every 10 seconds across a few hours of specular observation time could really nail wave properties and lake index of refraction & composition; see next talk.