Polar Studies with SHARAD

Isaac SmithSHARAD workshop, pre-LPSC 2014

Friday, May 9, 2014

Polar Studies with SHARAD

QDA_2764501

QDA_2356101

Friday, May 9, 2014

Polar Studies with SHARAD

North pole

South pole

QDA_2764501

QDA_2356101

Friday, May 9, 2014

•North Pole•South Pole

North pole

South pole

Generally more reflectors

More diffuse, reflectors only in certain spots

Friday, May 9, 2014

•North Pole•South Pole

North pole

South pole

Generally more reflectors

More diffuse, reflectors only in certain spots

Bottom often detected

Bottom seldom detectedFriday, May 9, 2014

•North Pole

NPLD base is easily detected, but Basal Unit is diffuse, and no BU bottom

Phillips et al, 2008

519201

Friday, May 9, 2014

Packet / inter packet patternSeen over much of the N pole

•North Pole Phillips et al, 2008

Friday, May 9, 2014

•North Pole

Sub- horizontal layering in lower 2/3Discontinuities in the top 1/3

Phillips et al, 2008

Friday, May 9, 2014

•North Pole

Discontinuities

Smith et al, 2010

QDA_624701

Friday, May 9, 2014

•South Pole

Australe Mensa has few reflectors

Friday, May 9, 2014

•South Pole

Australe Lingula has few reflectors

2759301

Friday, May 9, 2014

Promethia Lingula has abundant layersMilkovich et al, 2009

Friday, May 9, 2014

Optimized radar processing

QDA

FPB_long_aperture

FPB_standardmore clutter

less clutter

1873701

Friday, May 9, 2014

Optimized radar processing

QDA

FPB_long_aperture

FPB_standardmore clutter

less clutter

1873701

Clutter

Friday, May 9, 2014

Optimized radar processing

QDA

FPB_long_aperture

FPB_standardmore clutter

less clutter

1873701

Friday, May 9, 2014

Optimized radar processing

QDA

FPB_long_aperture

FPB_standardmore clutter

less clutter

1873701

artifacts

Friday, May 9, 2014

Optimized radar processing

QDA

FPB_long_aperture

FPB_standardmore clutter

less clutter

1873701

Friday, May 9, 2014

Optimized radar processing

QDA

FPB_long_aperture

FPB_standardmore clutter

less clutter

1873701

0.6 Hz6400 aperture

Friday, May 9, 2014

Optimized radar processing

QDA

FPB_long_aperture

FPB_standardmore clutter

less clutter

1873701

0.6 Hz6400 aperture

Friday, May 9, 2014

Optimized radar processing

QDA

FPB_long_aperture

FPB_standardmore clutter

less clutter

1873701

0.6 Hz6400 aperture

Friday, May 9, 2014

Optimized radar processing

QDA

FPB_standard

FPB_long_aperture

FPB standard has good ionosphere correction

FPB long aperture has more continuous reflectors

QDA has less consistent ionosphere but good continuity

sometimes, things get smeared

less clutterFriday, May 9, 2014

QDA

FPB_standard

FPB_long_aperture

FPB standard has good ionosphere correction

FPB long aperture has more continuous reflectors

QDA has less consistent ionosphere but good continuityless clutter

sometimesQDA sees dimmer reflectors

Friday, May 9, 2014

Moral

Determine which processor is best for each application

Usually good to compare for each case

Friday, May 9, 2014

Spacecraft orientation

2163601

1308201

almost no clutter

very difficult to interpret good orientation

bad orientation

Friday, May 9, 2014