SLIDE 1
The search of water in Mars using radars
Tomás Ahumada
Motivation
- First publication
- Following
publications
- How to do it?
The search of water in Mars using radars Toms Ahumada Motivation - - PowerPoint PPT Presentation
The search of water in Mars using radars Toms Ahumada Motivation - - PowerPoint PPT Presentation
The search of water in Mars using radars Toms Ahumada Motivation First publication Following publications How to do it? ESA The Satellite Mars Explorer MARSIS Radar specifics Radargram Diagram to explain
SLIDE 2
SLIDE 3
The Satellite
- Mars Explorer
- MARSIS
- Radar specifics
ESA
SLIDE 4
Radargram
- Diagram to
explain
- Permittivity
SLIDE 5
The data
- Data downloaded
- Signal to Noise
- Location of the
footprints
- Radargrams
SLIDE 6
Radar Reduction sequence
Step 1: Decompress the level 1A data. Step 2: Transform the data to power expresses in the units of dBm. Step 3: Convert power to the antenna by correcting for system gain. The system gain is frequency dependent and data are corrected for variations in system gain over frequency via a lookup table Step 4: Divide by the bandwidth (10.9KHz) and antenna length squared; (20m2)
Raw Telemetry data Decompress + express in dBm Power - Gain Divide by bandwidth and antenna length squared V2/m2/Hz
SLIDE 7
Methods
- Image analysis
- Threshold
detection per line
- Detection
algorithm
SLIDE 8
Methods
- Image analysis
- Threshold
detection per line
- Detection
algorithm
SLIDE 9
Methods
- Image analysis
- Threshold
detection per line
- Detection
algorithm
SLIDE 10
Methods
- Image analysis
- Threshold
detection per line
- Detection
algorithm
SLIDE 11
Methods
- Image analysis
- Threshold
detection per line
- Detection
algorithm
SLIDE 12
Results
- Power spectra of
layer features
SLIDE 13
Future work
- Getting the
permittivity
- Spatial
comparison
For the surface (s) For the layer underground
Porcello et al. 1974
SLIDE 14
Conclusions
- SNR constraints over
MARSIS data
- Data management
- Determination of the
composition of subsurface layers is based on the estimate
- f their dielectric
properties.
Carter et al. 2009