EO-1 Satellite Data

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Introduction

Hyperion and ALI

EO-1 is no longer available from Geoscience Australia. Products derived from the Hyperion and ALI sensors on board the EO-1 satellite External site link were available from Geoscience Australia through a special arrangement with the NASA and the United States Geological Survey.

EO-1 satellite

EO-1 satellite

The Hyperion sensor onboard the satellite is the first hyperspectral sensor on an Earth observation satellite. It covers the complete spectral range from 0.4 to 2.5 µm in 220 bands. Such comprehensive spectral resolution permits very detailed land cover classifications or identifications to be performed.

The Advanced Land Imager (ALI) was designed to demonstrate improved Landsat spatial and spectral resolution with substantial mass, volume and cost savings. Its proven performance has the potential to reduce the cost and size of future Landsat-type instruments by up to 5 times. Details of the two sensors are shown in the image below.

Historical information

The EO-1 mission was initially experimental until the end of 2001. However, due to continued demand the satellite operators have extended the mission on an operational basis until at least September 2007.

Early in 2002, CSIRO and Geoscience Australia coordinated a bulk purchase of EO-1 data from the United States Geological Survey, predominantly for CSIRO users. This initial bulk purchase involved acquisitions for a limited time until March 2002. Subsequently, the satellite mission has been extended and Geoscience Australia has been able to negotiate the continued supply of EO-1 products to Australian customers under the terms and conditions outlined below.

Satellite characteristics

Product Specifications

EO-1 satellite ground track

EO-1 satellite ground track

The EO-1 satellite follows the same orbit as Landsat 7 by about one minute. However, unlike Landsat 7, EO-1 can be pointed sideways (even into adjacent Landsat paths) so that customers can define any point on which to centre their acquisition. Note that for the one acquisition, the centre of a Hyperion swath is different to the centre of an ALI swath, as shown in the image left. Please note that there may be programming constraints and extra fees incurred for the satellite to be tilted to image an off-nadir pass.

Parameter Hyperion ALI
Swath width (km) 7.7 37
Product Length (km) 42 or 185 42 or 185
Spatial resolution (metres) 30 30
Processing Level Level 1R (radiometrically corrected only) Level 1R (radiometrically corrected only) or Level 1G (radiometrically and geometrically corrected and georeferenced)
Format HDF CEOS 1R: HDF CEOS; 1G: HDF CEOS or GeoTIFF
Approx file sizes ~200Mb ~300Mb
Media DVD DVD
Spectral range (µm) 0.4 - 2.5 0.4 - 2.5
Spectral resolution (nm) 10 Variable
Spectral coverage Continuous Discrete
Pan band resolution (metres) N/A 10
Total number of bands 220 10

Quick Look Images

Low resolution Quick Look Images are available some time after acquisition from the EDC EarthExplorer tool External site link.

However, Landsat 7 Quick Looks taken 1 minute prior to the EO-1 overpass may also be used for cloud assessment, assuming EO-1 is not pointing outside of the Landsat 7 swath.

How to get EO-1 imagery and data

Terms and Conditions

Data Acquisition Request (DAR)

A DAR allows a customer to provide the information necessary to schedule an acquisition over their area of interest. A new DAR is required for each area or data range. Scheduling conflicts and satellite maintenance may affect instrument availability.

A DAR should be placed at least 30 days prior to the required acquisition date to provide the maximum chance of the request being granted. Please allow five business days for a reply to your DAR submission.

Each order involves a DAR and subsequent data processing. Please contact us if you wish to submit a DAR.

After EO-1 has imaged the DAR location and the data are received, a cloud cover assessment will be performed over the entire image by USGS/EROS. If the image contains less than 20% cloud cover, the DAR will be considered fulfilled and, if applicable, you will be billed the $1,275 DAR fee. A browse image is sent to you by email for your review and approval; upon your approval, the data product will be generated and shipped. If the image contains more than 20% cloud cover, EROS will reschedule the target scene up to two additional times at no extra cost.

Typical timelines from down-link to distribution are approximately one to four weeks.

Orders need to include:

  • site Lat/Long centre in decimal degrees
  • area name and country
  • site name
  • pointing mode ie off-nadir or within nadir
  • sensor ie ALI or Hyperion
  • scene length, ie 42km or 185km
  • date/s for acquistion window. It is best to provide at least a three month acquisition window to allow adequate time for fulfillment of the DAR.

DAR Pricing

Please note that all EO-1 prices are now in Australia dollars.

A DAR will be charged at $1275** plus the processing price.

**Note: A limited number of DARs are available free of charge (excludes processing price) per month.

Please contact: Earth Observation Client Services if you wish to enquire about the availability of a free DAR or submit a DAR.

Processing prices for DAR and Archive data

Price per product (regardless of scene length)
Level 1R (either instrument) $425 + freight
Level 1G (ALI only) $850 + freight

Payment

  • Pre-payment is required for all non-account orders.
  • Payment can be made by credit card, cheque or direct credit.
  • We accept Bankcard, Mastercard or Visa credit cards.
  • If you are paying by cheque or direct credit, please contact: Earth Observation Client Services first to confirm pricing.

Freight Cost

$50 per data set

Topic contact: earth.observation@ga.gov.au Last updated: January 21, 2014