Mike Grant

ARSF Data Analysis Node

ARSF Data Analysis Node

Based at Plymouth Marine Laboratory NERC Collaborative center

Brief history ARSF processing was in-house via

several people until 2006/7 Staff changes lost expertise +

growth in data volume and complexity meant the processing became backlogged

Addressed by a move of the processing to a specialist center

Why PML?

>10 years of remote sensing expertise

Strong computing skills and capacity

ARSF funds ~3 processors, but PML brings this up to 7 at times of high load

Links to science and international collaboration

ARSF overflight of Plymouth Sound, 2006

Hyperspectral data processing

Level 0 (raw) to level 1b GPS navigation Radiometric correction Formatting +

transformations Timing + positioning

corrections Extra steps:

Boresight calibration Atmospheric correction

(Level 2) Geocorrection (Level 3)

Level 0 raw data

Level 3 geocorrected data (1 band)

Hyperspectral data processing

Level 0 (raw) to level 1b GPS navigation Radiometric correction Formatting +

transformations Timing + positioning

corrections Extra steps:

Boresight calibration Atmospheric correction

(Level 2) Geocorrection (Level 3)

Little Rissington boresight calibration site + markup

LIDAR data processing

Raw data to point cloud Navigation Formatting Positioning corrections

DEMs for hyperspectral filled with ASTER,

NextMAP, etc Full waveform RCD (digital camera)

LIDAR intensity mosaic

Raw data points and scans

LIDAR data processing

Raw data to point cloud Navigation Formatting Positioning corrections

DEMs for hyperspectral filled with ASTER,

NextMAP, etc Full waveform RCD (digital camera)

Full waveform concept

Little Rissington DEM in relief (height differences exaggerated for display)

User support

Carry on the existing contact from application to flight, through to data processing and end user support +NEODC archive users

Live processing status webpage

Ticket system open Fast response helpdesk

Analysis

Radiometric calibration ARSF conduct own

calibration with FSF Identified and

corrected two serious radiometric issues

Issue analysis and correction Specim frame timing LIDAR roll errors Software bugs!

Eagle CCD response in calibration

Frame-shift smear estimated error

Analysis

Radiometric calibration ARSF conduct own

calibration with FSF Identified and

corrected two serious radiometric issues

Issue analysis and correction Specim frame timing LIDAR roll errors Software bugs! Specim frame timing errors

(top: 0.03s error; bottom: corrected)

Development

APL LIDAR processor FastQC + LIDAR

viewers FW LIDAR extractions

Higher order descriptors International interaction

libLAS/LASTools EUFAR HYQUAPRO

Cumbria floods (2009)

Ethiopia LIDAR (2008)

Development

APL LIDAR processor FastQC + LIDAR

viewers FW LIDAR extractions

Higher order descriptors International interaction

libLAS/LASTools EUFAR HYQUAPRO

New Forest full waveform trial (2010)

Development

APL LIDAR processor FastQC + LIDAR

viewers FW LIDAR extractions

Higher order descriptors International interaction

libLAS/LASTools EUFAR HYQUAPRO

New Forest full waveform trial (2010)

Future

Improved systems Further automation Atmospheric

correction Greater integration of

sensors Unified data

New sensors?

Data processing turned around since 2007/8 Part of the improvements of the service in

collaboration with ARSF-Ops Data processing team can draw on a pool of

expertise and capacity at no extra cost Many complex instrument and science issues

addressed Providing significant extra value beyond

simple processing Calibration, analysis, development, international

interaction

Summary

Questions?

Google Earth visualisation

New Forest mosaic

LIDAR DEM

Little Rissington DEM in relief (height differences significantly exaggerated for display)

LIDAR scanner

Specim timing

Straylight

Navsync system diagram