Ordering Satellite Images
IKONOS and SPOT
For the IJzermonding and the Molenplaat
Ordering Satellite Images ................................................................................................. 1
1- The Study Areas ...................................................................................................... 2
2- Stating the Requirements ........................................................................................ 2
3- IKONOS ................................................................................................................. 2
3.1
General Description ........................................................................................ 2
3.2
Flight Windows ............................................................................................... 3
3.3
Order Form...................................................................................................... 3
4- SPOT ....................................................................................................................... 4
4.1
General Description ......................................................................................... 4
4.2
Flight Windows ............................................................................................... 4
4.3
Order Form...................................................................................................... 5
5- LandSat 7 ................................................................................................................ 5
5.1
General Description ........................................................................................ 5
5.2
Flight Window ................................................................................................ 5
5.3
Order Form...................................................................................................... 5
6- LandSat 5 ................................................................................................................ 6
6.1
General Description ........................................................................................ 6
6.2
Flight Window ................................................................................................ 6
6.3
Order Form...................................................................................................... 6
7- KOMPSAT ............................................................................................................. 6
7.1
General Description ........................................................................................ 6
7.2
Flight Window ................................................................................................ 7
7.3
Order Form...................................................................................................... 7
1- The Study Areas
The IJzermonding is located at the outlet of the IJzer River. It is a nature reserve
with a marsh area. It falls on the following coordinates:
Upper Left Latitude: 51.16690278, Upper Left Longitude: 2.7222
Lower Right Latitude: 51.1350, Lower Right Longitude: 2.7601
The Molenplaat is located in the Westerschelde estuary. It is a nature reserve for
birds and an important industrial and commercial route. It falls on the following
coordinates:
Upper Left Latitude: 51.469, Upper Left Longitude: 3.947
Lower Right Latitude: 51.383, Lower Right Longitude: 3.945
2- Stating the Requirements
The images that were required for ALGASED were to be acquired during low
tide. The tide schedule for June 2007, in local time, was obtained from the kust weer
bericht website. Therefore, it is essential to compare the expected revisit time for each
satellite with the tide schedule. There is a measurement station available at the
IJzermonding (Nieuwpoort). Yet, there is none available at the Molenplaat. So, the
measurements of the Hansweert station is used knowing that the tide at Hansweert occurs
1 hour and 26minutes before low water Antwerp (used for the Molenplaat)
3- IKONOS
3.1
General Description
The IKONOS satellite was launched on September 24, 1999. The satellite carries
two sensors, able to collect panchromatic images with one-meter resolution and
multispectral images with four-meter resolution.
The IKONOS sensors have the following specifications:
- An 11 bit panchromatic sensor which collects a single band of data in the spectral
range of 0.45 - 0.90 microns.
- An 11 bit multispectral sensor which collects 4 bands of data in the following spectral
bands;
o Band 1 : 0.445 - 0.516 microns - red
o Band 2 - 0.506 - 0.595 microns - green
o Band 3 - 0.632 - 0.698 microns - blue
o Band 4 - 0.757 - 0.853 microns - near infrared
IKONOS is in a sun-synchronous orbit 681 kilometers above the earth. Each
orbit takes about 98 minutes. This orbit that allows for nominal 10:30 AM image
collection provides consistent images from revisit times. IKONOS can provide new one
meter panchromatic or four-meter multispectral images of any where in the world every
three days. If needed a 2.5 meter or better can be collected everyday of any location. An
exact revisit occurs every 142 days
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The image swath & scene sizes are as follows:
Single images of 13 km x 13 km
Single swath images of 11 km X 100 km
For more info, check the following websites:
Land Info (Worldwide Mapping)
IKONOS on the European Space Imaging Website
IKONOS on Global GeoScience Website
3.2
Flight Windows
IKONOS acquires images of the study site at around 11 am UTC i.e. 13:00 Local
time (summer). An interval of ± 1.5 hr around the revisit time was chosen to select
suitable images. The following days were chosen as days in June 2007 with potential
suitable images at Low tide:
IJzermonding
6, 7, 8, 19, 20, 21, 22, 23
Molenplaat
4, 5, 6, 7, 17, 18, 19, 20, 21
3.3
Order Form
EUSI's minimum order requirements are 49 sq.km for archive imagery and 100
sq.km for new collects respectively.
The IKONOS Product form can be downloaded from the European Space
Imaging (EUSI) website.
For more info, contact the regional affiliate: info@euspaceimaging.com
Once the form is filled, it is to be sent to Belspo and they handle the ordering.
Once the Order Form is in its entirety, Call/fax Customer Support with your order:
Phone: +49 89 130 142 0
Fax: +49 89 130 142 22
Email: support@EUSpaceImaging.com
Hours: 0900-1800 (GMT+1) (Monday - Friday)
On receipt of your order form, EUSI will check for completion and send an emailed
Order Confirmation, detailing payment procedures and estimated delivery time. A
username and password were provided to enable order tracking online Order Tracking
Database.
4- SPOT
4.1 General Description
The system has been operational since 1986 when SPOT 1 was launched.
SPOT 2 was placed in orbit in January 1990, followed by SPOT 3 in September 1993,
SPOT 4 in March 1998 and SPOT 5 in May 2002. The images required for the study
areas are from SPOT 5.
A polar orbit
In conjunction with the rotation of the earth around the polar axis, the inclination of the
orbital plane (98 degrees) allows the satellite to fly over any point of the earth during a
26-day cycle.
A circular orbit
• Altitude: 832 km
• Inclination: 98 degrees (i.e. near-polar orbit)
• Revolutions per day: 14 + 5/26
• Period: 101 minutes
• Westward drift between successive ground tracks: 2823 km
• Cycle duration: 26 days
• Orbital revolutions per cycle: 369
If images of different locations are to be suitable for comparison, they must be
acquired from the same altitude. Thus, the orbit must be circular, or have a constant
altitude relative to the Earth's surface. Every 26 days, each Spot satellite flies over the
same points on the ground in a sun-synchronous orbit descending node at 10:30 am.
During this period of time, it will make an integer number of revolutions (369) following
one complete track cycle (the satellite performs 14 + 5/26 revolutions per day). The earth
can be completely covered in a 26-day cycle.
For more information, refer to the SPOT website
For checking the archives of SPOT, go to sirius website
4.2
Flight Windows
SPOT acquires images of the study site at around 11 am UTC i.e. 13:00 Local
time (summer). An interval of ± 1.5 hr around the revisit time was chosen to select
suitable images. The following days were chosen as days in June 2007 with potential
suitable images at Low tide:
IJzermonding
6, 7, 8, 19, 20, 21, 22, 23
Molenplaat
4, 5, 6, 7, 17, 18, 19, 20, 21
4.3
Order Form
To order the SPOT images, it is required to create a new application at OASIS
website. Create a username and password. The username and password used to order the
images for the study areas were obtained from Prof. Jaak Monbaliu. The required entries
involve information about the project the images will be used for, its objectives,
methodology, experience and publications, expected results, etc…
The order is submitted through the website at the end of the Order Form.
5- LandSat 7
5.1 General Description
Landsat 7 was launched and injected into identical 705 kilometer, sunsynchronous orbits in 1999. This same day orbit configuration will space the satellites
ideally 15 minutes apart (i.e. equatorial crossing times of 10:00 to 10:15 AM for Landsat
7). A multispectral data set having both high (30 meter) and medium to coarse (250 to
1000 meter) spatial resolution will thus be acquired on a global basis repetitively and
under nearly identical atmospheric and plant physiological conditions.
The orbit of Landsat 7 is repetitive, circular, Sun-synchronous, and near polar at a
nominal altitude of 705 km (438 miles) at the Equator. The spacecraft crosses the Equator
from north to south on a descending orbital node from between 10:00 AM and 10:15 AM
on each pass. Circling the Earth at 7.5 km/sec, each orbit takes nearly 99 minutes. The
spacecraft completes just over 14 orbits per day, covering the entire Earth between 81
degrees north and south latitude every 16 days.
For more information, check the USGS website.
5.2 Flight Window
LandSat 7 acquires images of the study site at around 10:30 am UTC i.e. 12:30
Local time (summer). An interval of ± 1.5 hr around the revisit time was chosen to select
suitable images. The days when landsat would overpass the study areas can be found
here. The following days were chosen as days in June 2007 with potential suitable images
at Low tide:
IJzermonding:
July 18 path 200
Molenplaat:
June 02 path 198
June 18 path 198
August 05 path 198
5.3 Order Form
To order the archived LandSat images, it is required to use the online form by
ESA. The required entries involve information about the project the images will be used
for, its objectives, methodology, experience and publications, expected results, etc…As
for the new acquisitions, order forms by Belspo are filled and sent back to Belspo.
6- LandSat 5
6.1 General Description
Similar to landsat7, with the following properties:
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Launch Date: March 1, 1984
Status: TM still operational! MSS instrument decommissioned
Sensors:TM, MSS
Altitude: 705 km
Inclination: 98.2°
Orbit: polar, sun-synchronous
Equatorial Crossing Time: nominally 9:45 AM (± 15 min.) local time (descending
node)
Period of Revolution : 99 minutes; ~14.5 orbits/day
Repeat Coverage : 16 days
For more information, check the USGS website.
6.2 Flight Window
LandSat 5 acquires images of the study site at around 10:30 am UTC i.e. 12:30
Local time (summer). An interval of ± 1.5 hr around the revisit time was chosen to select
suitable images. The days when landsat 5 would overpass the study areas can be found
here. The following days were chosen as days in June 2007 with potential suitable images
at Low tide:
IJzermonding:
June 08 path 200
July 19 path 199
August 04 path 199
August 20 path 199
Molenplaat:
August 29 path 198
6.3 Order Form
To order the archived LandSat images, it is required to use the online form by
ESA. The required entries involve information about the project the images will be used
for, its objectives, methodology, experience and publications, expected results, etc…As
for the new acquisitions, order forms by Belspo are filled and sent back to Belspo.
7- KOMPSAT
7.1 General Description
Kompsat-1 is a high resolution optical mission of Korea launched in 1999.
Through a 3rd party mission agreement ESA will make a sample dataset of European
cities available from this satellite.
The KOMPSAT program was initiated in 1995 as a major space investment in Korea. Its
objective is the development of a national space segment in Earth observation along with
an efficient infrastructure and ground segment to provide valuable services to remote
sensing users in various fields of applications.
For more info, check the KOMPSAT on esa website
7.2 Flight Window
Kompsat-1 acquires images of the study site at around 10:30 am UTC i.e. 12:30
Local time (summer). An interval of ± 1.5 hr around the revisit time was chosen to select
suitable images. The following days were chosen as days in June 2007 with potential
suitable images at Low tide:
IJzermonding
6, 7, 8, 19, 20, 21, 22, 23
Molenplaat
4, 5, 6, 7, 17, 18, 19, 20, 21
7.3 Order Form
To order for new acquisitions of KOMPSAT images, order forms by Belspo are
filled and sent back to Belspo.