The hole is over m across and m deep. A mission end is estimated to be at the end of A painted target and multiple other checkpoints are measured from the image. The difference between the position measured in the image and predicted by the RPC camera model is plotted in Figure The charts show absolute accuracy, as difference from zero, and relative accuracy, as coincidence of multiple target measurements from the same scene.
Ikonos calibrations were recently updated to correct a southward drift in calibrations since the last update in Figure 12 : History of the Ikonos geolocation history image credit: GeoEye. The latest "through-focus" assessment in the fall of , resulted in no need for a focus adjustment.
Focus adjustments have not been needed since , consistent with an asymptotic leveling-off of telescope growth Ref. The world's first high-resolution satellite continues to provide imagery of the Earth to commercial and government customers around the world.
The multiyear agreement applies for imagery acquired from January 1, onwards. Figure 14 : Ikonos-2 image acquired on Nov. Iran is one of the world's most important mineral producers. Earth-observing satellites are useful for finding and monitoring natural resources like minerals. ESA supports Ikonos-2 as a Third Party Mission, which means that the Agency uses its multi-mission European ground infrastructure and expertise to acquire, process and distribute data from the satellite to its wide scientific user community.
Figure This image of Ikonos-2, acquired on April 27, , shows the sandy and rocky terrain of the Sahara desert in western Algeria image credit: ESA Ikonos-2 continues to perform almost flawlessly in terms of quantity and quality of imagery that it collects.
GeoEye estimates that Ikonos-2 may continue its operational life into the next decade the analysis on the life expectancy was performed Lockheed Martin Corporation in the fall of The 1 m resolution black-and-white image of Washington, D. OSA was designed and custom-built by Kodak Co. The instrument features a Cassegrain-type telescope with a 70 cm diameter primary mirror, a 10 m focal length folded optics design. The OTA Optical Telescope Assembly captures imagery across a swath of km, it uses five mirrors to reflect the imagery to the imaging sensor arrays at the back end of the telescope.
Note: TMA refers to lenses that are able to form approximately point images of target object points. Simultaneous imaging in panchromatic and multispectral modes is provided.
The instrument light level is governed by a 70 cm aperture and a choice of 10, 13, 18, 24, or 32 TDI Time Delay Integration stages for panchromatic gray-scale imaging. The detector array offers a cumulative exposure concept for panchromatic imaging. Piwowar 33 The mass of the primary mirror was reduced by cutting a honeycomb pattern into its core using abrasive waterjet technology, and fusing thin mirror plates to each face.
Assembly size: 1. The angular slew rate is sufficient to perform both wide-area monoscopic and same-pass stereo collections. The location knowledge accuracy of the imagery is 2 m horizontal relative i. Smooth scanning is provided with accurate gyros, low disturbance torques smooth antenna gimbals and reaction wheels , and a rigid high-frequency structure of the satellite.
This technique permits, for instance, the full-swath imaging of a particular feature of interest on the Earth's surface, such as a coastline, which traverses under some angle through the in-track direction. Table 3: Some performance parameters of the OSA instrument. The data acquisitions of PAN and MS imagery data are simultaneous and fully co-registered; mono or stereo.
Instrument calibration: The agile pointing capability of Ikonos is being utilized for instrument calibration. Solar, lunar and stellar scenes serve as radiometric instrument calibration sources. The ecliptic portion of the orbit is being used for stellar calibration. Absolute calibration of the Ikonos sensors is performed by comparing the total digital numbers found in the stellar image, to the absolute in-band spectral radiance of several radiometrically characterized stars.
The radiometric calibration provides relative and absolute corrections for detector channel responsivity differences. Since launch, the Ikonos-2 satellite has undergone a series of geometric calibrations. The Ikonos geometric sensor model includes the interior orientation parameters, i. The initial values of the interlock angles and the FAM parameters were determined by pre-launch measurements.
They were subsequently refined by a series of on-orbit geometric calibrations. Ground image data processing provides geocoding along with image compensation algorithms [misregistration, image motion, radiometric correction, MTF modulation transfer function compensation, etc.
Space Imaging Inc. A great variety of image products and services are provided. Standard products are:. Figure 18 : First Ikonos image of Washington D. This Model system design is owned by Kodak, containing some design changes with respect to OSA reduced telescope aperture and instrument mass to fit onto minisatellites.
The optical components are made from high quality, low thermal expansion glass substrates. The metering and mounting structures are made from low thermal expansion materials to match the expansion properties of the glass components.
OTU has a mass of 45 kg, the power consumption is 15 W. The DPU compresses the 11 bit digitized image data to about 2. The DPU can format data for interface with an on-board storage unit and data downlink.
There is full redundancy. Multispectral focal plane detector array Detector material, array type Pixel size Number of cross-track pixels Line rate Spectral filters. Table 4: Specification of the Model camera system. Figure Illustration of Kodak's Model camera system image credit: Kodak. Martin, "Satellite image collection optimization," Optical Engineering, Vol. The information compiled and edited in this article was provided by Herbert J.
Kramer from his documentation of: "Observation of the Earth and Its Environment: Survey of Missions and Sensors" Springer Verlag as well as many other sources after the publication of the 4th edition in Optical telescope assembly Assembly size: 1. Spectral range PAN panchromatic 0. Featured Images. Terms and Conditions Cookie notice. Altogether, it paved the way for other commercial satellites. With this in mind, it began a new era of Earth intelligence from space.
This satellite provides panchromatic, natural-color, color-infrared and stereo images. In particular, this is useful for cartographic, photogrammetric and various remote sensing applications. I want to use SPOT image for my thesis however it is not acquired by nearest center. How I can get it? Your email address will not be published. Skip to content. We explain everything you need to know about this satellite. Leave a Reply Cancel reply Your email address will not be published.
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