Products derived from the Hyperion and ALI sensors on board the EO-1 satellite are available from Geoscience Australia through a special arrangement with the NASA and the United States Geological Survey.
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.
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.
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 |
Low resolution Quick Look Images are available some time after acquisition from the EDC EarthExplorer tool.
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. Landsat 7 Quick Looks are available on the Earth Observation Catalogue within four hours of acquisition.
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:
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.
| Price per product (regardless of scene length) | |
|---|---|
| Level 1R (either instrument) | $425 + freight |
| Level 1G (ALI only) | $850 + freight |
$50 per data set
To enquire about data availability or to order your Hyperion or ALI data, please contact: Earth Observation Client Services.