PP1- Monitoring land surfaces at SAFE using field and remote sensing data

Monitoring land surfaces at SAFE using field and remote sensing data

Workshop, Science@SAFE 2014

Marion Pfeifer1, Robert Ewers1

Earth Observation At SAFE

Schedule for workshop:

Remotely sensed data currently available SlidesDetails on these data: structure, temporal, spatial coverage

Lab

Processing of the data SlidesHow we use the data at F.E.C. and what maps we produce

Slides + Lab

Vero’s forest quality metric SlidesRemotely sensed data and maps in the future Slides +

LabOnline accessible satellite products for land surface analyses

Slides

Question time: in and between


Acquisition of information about an object without making physical contact

with the object

What is Remote Sensing ?

Remotely Sensed Data


Record radiation that originates from a source outside the sensor and is reflected from the earth’s surface.

Passive Sensors

http://www.oneonta.edu/faculty/baumanpr/geosat2/RS-Introduction/RS-Introduction.html



send out a signal (energy source from within sensor) and measure its backscatter from the surface.

Active Sensors

LIDAR Light detection and

ranging

RADARRadio detection and

ranging



measure the transmission of energy from the land surface in different parts of

the electromagnetic spectrum.

Passive Sensors

The surface varies and so does the energy transmission



BlueGreen

REDAbsorption by waterLandsat 7’s seven bands


Shaw & Burke, 2003. Lincoln Laboratory Journal

Earth Observation At SAFE Remotely Sensed Data


The number of spectral bands in which the sensor can collect reflected

radiance.

Passive Sensors: spectral resolution

ASTER

Landsat TM

High: 16 < 220Medium: 3 - 15Low SR: < 3



specifies the pixel size of satellite images covering the earth surface.

Passive Sensors: spatial resolution

Very High: < 1 m High: 1 - 10 m (SPOT, RapidEye)Medium: 10 - 30 m (SPOT, ASTER)Coarse: > 250 m (MODIS, AVHRR)

Effects of aggregation on canopy spatial information generated from a detailed 3D model of a savannah-type canopy



Trade-offs

Scene sizeRevisit timeSpatial resolutionWhat’s your chance of a cloud-free pixel ?



RapidEye • five Earth Observation satellites, since 02/09• Sensor: RapidEye Earth Imaging System (REIS)• Image bands

Blue: 440 – 510 nmGreen: 520 – 590 nmRed: 630 – 685 nmRed Edge: 690 – 730 nmNear IR: 760 – 850 nm

• Resolution: 6.5 m (resampled to 5 m)• Capability for daily revisit to any point on earth

Satellite data at SAFE

Earth Observation At SAFE Satellite data at SAFE

RapidEye at SAFE: http://eyefind.rapideye.com/


RapidEye at SAFE: ESA project N = 16, 04/12 to 01/13, Maliau: 4 images from same date


RapidEye at SAFE: ESA project

That’s pathetic ?

False Colour Composites



OG2 Upper part of F


SPOT 5 • Satellite with HRG sensor, since 05/02• Sensor: RapidEye Earth Imaging System (REIS)• Image bands

Green: 500 – 590 nmRed: 610 – 680 nmNear-IR: 780 – 890 nmShortwave-IR: 1580 – 1750 nmPAN: 480 – 710 nm

• Resolution: 10 m multispectral (pan-sharpened: 2.5 and 5 m)• Capability for 2-3 days revisit time



SPOT 5


BORNEO_SPOT1 to BORNEO_SPOT_4, 1 is 28/04/2009 and for all others: with some other years intermixed?, 2.5 m. Need offset and gain from originals though for calibration.

These are pan-sharpened images – the original ones are larger and at 10 m pixel resolution for multispectral data. SAFE_SP1 to SAFE_SP5.

Borneo_SPOT1, 2.5 m


SPOT 5

28/04/2009, 2.5 m

SPOT 5SAFE_SP1 to SAFE_SP5,10 m, 2009 - 2011

28/04/2009

28/04/2009

20/08/2009

23/07/2011

29/08/2010


The PAN band is not in the database!


Landsat 8 - Data Continuity Mission, Launched 11/02/2013

Bands Wavelength [µm]

Resolution [m]

B1 - Coastal aerosol 0.43 - 0.45 30B2 - Blue 0.45 - 0.51 30B3 - Green 0.53 - 0.59 30B4 - Red 0.64 - 0.67 30B5 - Near Infrared (NIR) 0.85 - 0.88 30B6 - SWIR 1 1.57 - 1.65 30B7 - SWIR 2 2.11 - 2.29 30B8 - Panchromatic 0.50 - 0.68 15B9 - Cirrus 1.36 - 1.38 30B10 - Thermal Infrared 1 10.60 - 11.19 100B11 - Thermal Infrared 2 11.50 - 12.51 100


Landsat 8LS_03, 30 m (multispectral), 29/01/2014


LS_04, 30 m, 10/11/2013

LS_02, 30 m, 25/08/2014


http://earthexplorer.usgs.gov/• GLS – for screened

and mosaicked images

• before 2013• Landsat Legacy for

post-2013



PROBA CHRIS • Compact High Resolution Imaging Spectrometer

• Open as Generic Format – Hdf4 – BSQ in ENVI and clean using Hdf_Clean tool from ESA

• From 19 bands at 18 m to 63 bands at 63 m pixel resolution


• Capability for 7 days revisit time

Thank you

Funding ERC, Sime Darby Foundation, European Space Agency


PP1- Monitoring land surfaces at SAFE using field and remote sensing data

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