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ARSF Data Analysis Node. Mike Grant. 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

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Arsf data analysis node1
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
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
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 processing1
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
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)

Raw data points and scans

LIDAR intensity mosaic


Lidar data processing1
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)

Little Rissington DEM in relief

(height differences exaggerated for display)

Full waveform concept


User support
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
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


Analysis1
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
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)


Development1
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)


Development2
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
Future

Improved systems

Further automation

Atmospheric correction

Greater integration of sensors

Unified data

New sensors?


Summary

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





Lidar dem
LIDAR DEM

Little Rissington DEM in relief

(height differences significantly exaggerated for display)






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