The Experts below are selected from a list of 2634 Experts worldwide ranked by ideXlab platform
Kohei Arai - One of the best experts on this subject based on the ideXlab platform.
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Atmospheric correction and vicarious calibration of ADEOS/AVNIR and OCTS
Advances in Space Research, 2000Co-Authors: Kohei AraiAbstract:Abstract A field campaign for a vicarious calibration of ADEOS/AVNIR and OCTS was conducted. From the campaign, it is found that the radiance from ADEOS/AVNIR band 1 and 2 show small discrepancy of −3.5 and −7.2(%) while those from band 3 and 4 show large discrepancy about −20(%) between the estimated and satellite data. Meanwhile it is also found that the discrepancy for OCTS is not so large, around −4 to 5(%).
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atmospheric correction and vicarious calibration of ADEOS avnir and octs
Advances in Space Research, 2000Co-Authors: Kohei AraiAbstract:Abstract A field campaign for a vicarious calibration of ADEOS/AVNIR and OCTS was conducted. From the campaign, it is found that the radiance from ADEOS/AVNIR band 1 and 2 show small discrepancy of −3.5 and −7.2(%) while those from band 3 and 4 show large discrepancy about −20(%) between the estimated and satellite data. Meanwhile it is also found that the discrepancy for OCTS is not so large, around −4 to 5(%).
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atmospheric correction and residual errors in vicarious cross calibration of avnir and octs both onboard ADEOS
Advances in Space Research, 2000Co-Authors: Kohei AraiAbstract:Abstract A method for vicarious calibration of a solar reflectance radiometer through an estimation of reflectance of the test site with a high spatial-resolution radiometer onboard the same platform is proposed. Here we treat the case of the vicarious cross-calibration of ADEOS/OCTS (Advanced Earth Observing Satellite/Ocean Color and Temperature Scanner) with ADEOS/AVNIR (Advanced Visible and Near Infrared Radiometer). Error budget analysis for the proposed method shows that the vicarious calibration error with approximately 4.4% error can be achieved. There the contribution of the high spatial-resolution radiometer error is around 3.3%, while the cross calibration error between the solar reflectance (low resolution) radiometer and the high spatial resolution one is about 2.8%.
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Error budget analysis of cross calibration method between ADEOS/AVNIR and OCTS
Advances in Space Research, 1999Co-Authors: Kohei AraiAbstract:Abstract An error budget analysis was made for cross calibration between two sensors, AVNIR and OCTS onboard ADEOS satellite. Cross calibration between ADEOS/AVNIR and OCTS was shown with a result of the calibration accuracy assessment and evaluation. The results show that the calibration error is less than 3 (%).
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error budget analysis of cross calibration method between ADEOS avnir and octs
Advances in Space Research, 1999Co-Authors: Kohei AraiAbstract:Abstract An error budget analysis was made for cross calibration between two sensors, AVNIR and OCTS onboard ADEOS satellite. Cross calibration between ADEOS/AVNIR and OCTS was shown with a result of the calibration accuracy assessment and evaluation. The results show that the calibration error is less than 3 (%).
H. Shimoda - One of the best experts on this subject based on the ideXlab platform.
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IGARSS - ADEOS II follow on program
IEEE International IEEE International IEEE International Geoscience and Remote Sensing Symposium 2004. IGARSS '04. Proceedings. 2004, 2004Co-Authors: H. ShimodaAbstract:ADEOS II was launched on Dec., 2002. However, after about 10 months operation, it has lost most of its power due to the solar paddle failure. The exact cause of the accident is not apparent at this time, JAXA is now considering to launch a satellite as a substitute of ADEOS II. Up to now, candidate sensors on board this satellite is 3, i.e. GLI follow on, AMSR follow on and SeaWinds follow on. The GLI F/O would be rather different from GLI. The main targets of GLI F/O are atmospheric aerosols, coastal zone and land. In order measure aerosols over both ocean and land, it would have ultra violet channels, as well as polarization and bidirectional observation capability. For, coastal zone and land observation, the IFOV of GLI F/O for these targets would be around 250 m. The instrument would be composed of several components. The shorter wavelength region would adopt push broom scanners, while long wave region would use a conventional whisk broom scanner. AMSR F/O would be very similar to AMSR on ADEOS II and AMSR-E on EOS-Aqua. SeaWinds F/O would be also similar to SeaWinds on ADEOS II with some modifications. There are two options on the orbit. One is the same to that of ADEOS II, i.e. around 800 km altitude. Another is a higher orbit to allow faster turn around. The target launch date is fiscal 2008
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ADEOS II follow on program
IGARSS 2004. 2004 IEEE International Geoscience and Remote Sensing Symposium, 2004Co-Authors: H. ShimodaAbstract:ADEOS II was launched on Dec., 2002. However, after about 10 months operation, it has lost most of its power due to the solar paddle failure. The exact cause of the accident is not apparent at this time, JAXA is now considering to launch a satellite as a substitute of ADEOS II. Up to now, candidate sensors on board this satellite is 3, i.e. GLI follow on, AMSR follow on and SeaWinds follow on. The GLI F/O would be rather different from GLI. The main targets of GLI F/O are atmospheric aerosols, coastal zone and land. In order measure aerosols over both ocean and land, it would have ultra violet channels, as well as polarization and bidirectional observation capability. For, coastal zone and land observation, the IFOV of GLI F/O for these targets would be around 250 m. The instrument would be composed of several components. The shorter wavelength region would adopt push broom scanners, while long wave region would use a conventional whisk broom scanner. AMSR F/O would be very similar to AMSR on ADEOS II and AMSR-E on EOS-Aqua. SeaWinds F/O would be also similar to SeaWinds on ADEOS II with some modifications. There are two options on the orbit. One is the same to that of ADEOS II, i.e. around 800 km altitude. Another is a higher orbit to allow faster turn around. The target launch date is fiscal 2008
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GCOM-A1 science plan [Global Change Observation Mission]
IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH, 2001Co-Authors: M. Suzuki, H. Shimoda, K. Shibasaki, T. Sano, S. Sobue, C. Ishida, T. OgawaAbstract:GCOM-A1 is one of the satellite programs as follow-on of ADEOS and ADEOS-II. GCOM-A1 is under planning, which is targeting for the launch in 2007 (January-March). GCOM (Global Change Observation Mission) is a Japan's new concept for systematic and long-term observation global environment and climate system from space. The mission concept of GCOM covers 15 years starting from ADEOS-II (February 2002 to 2007), GCOM-A1 and -B1 (2007-2012), and GCOM-A2 and -B2 (2012-17). Within this mission period, key geophysical parameters necessary to document and understand global changes and climate variability will be measured continuously, but it does not mean the same instruments will be deployed over 10 or 15 years. GCOM-A1 will be a satellite dedicated to measure parameters related to atmospheric chemistry and dynamics. It will carry three instruments, ODUS (Ozone Dynamics Ultraviolet Spectrometer) by NASDA, SOFIS (Solar Occultation FTS for Inclined orbit Satellite) by the Ministry of Environment of Japan, and SWIFT (Stratospheric Wind Interferometer For Transport studies) by ESA and CSA. ODUS is a satellite-borne, nadir-looking ultraviolet spectrometer for measuring total column ozone, SO/sub 2/, aerosols, NO/sub 2/, HCHO, BrO, and OClO. It will be NASDA's core instrument for GCOM-A1. SOFIS is a successor of ADEOS/ILAS and ADEOS-II/ILAS-II by using the solar occultation technique in the infrared region. SWIFT is a successor of UARS/WINDII but using the 9 /spl mu/m ozone emission line to measure the stratospheric winds (
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meridional distribution feature of minor constituents as observed by img sensor aboard ADEOS satellite
Advances in Space Research, 2000Co-Authors: R Imasu, Toshihiro Ogawa, H. ShimodaAbstract:Abstract Interferometric Monitor for Greenhouse gases (IMG) sensor aboard the Advanced Earth Observing Satellite (ADEOS) is a Fourier Transform type infrared spectrometer (FT-IR) which was developed aiming to measure the greenhouse gases in the atmosphere, particularly in the troposphere. It was operated for about 7 months from November 1996 up to the end of the life time of the ADEOS on June 1997, and measured over 138000 terrestrial thermal emission spectra which are available for the retrieval analysis. A cloud detection and correction method based on the analysis of the initially retrieved temperature profiles were presented. Using the cloud correction method, meridional distribution of temperature and minor constitutents were preliminarily analyzed.
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ADEOS III
IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293), 1999Co-Authors: H. ShimodaAbstract:ADEOS III is a follow on of ADEOS II and is under phase A study in NASDA (National Space Development Agency of Japan). Mission concept of ADEOS series satellites are to continuously monitor global change phenomena, especially phenomena related to climate change and ozone depletion. ADEOS III is now composed of 2 satellites, i.e. ADEOS IIIA and ADEOS IIIB. The target of ADEOS IIIA is to monitor greenhouse gases distribution and ozone as well as ozone related constituents from oblique orbit. It is now planned to carry two instruments, i.e. ILAS III and ODUS. The target of ADEOS IIIB is to measure geophysical parameters which are uncertain in the today's climate models. Those parameters include, but are not limited to, optical thickness of aerosols and clouds, thermal fluxes, carbon fluxes, sink and source of greenhouse gases, etc. ADEOS IIIB will carry five instruments, i.e. SGLI (GLI follow on), AMSR2 (AMSR follow on), SeaWinds2 (SeaWinds follow on), ATRAS (IMG follow on) and APOLDER (POLDER follow on). The orbit of ADEOS IIIB will be a Sun synchronous orbit, which is almost the same as ADEOS II. ADEOS IIIA is planned to be launched in 2004, and ADEOS IIIB is planned to be launched in 2005.
Haruhisa Shimoda - One of the best experts on this subject based on the ideXlab platform.
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GCOM science overview
2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017Co-Authors: Haruhisa ShimodaAbstract:ADEOS II was launched on Dec., 2002. However, after about 10 months operation, it has lost most of its power due to the solar paddle failure. As a follow on of ADEOS II mission, JAXA is now planning GCOM mission which is composed of a series of satellites. They are now called GCOM-W and GCOM-C satellites. Both satellites are composed of 3 satellites with 5 year lifetime. Hence, 13 years of continuous observation can be assured with 1 year overlaps. The first satellite of GCOM-W was launched on 18, May, 2012 while the first one of GCOM-C will be launched in 2017. GCOM-W1 carries AMSR-2 (AMSR F/O). AMSR-2 is very similar to AMSR on ADEOS II and AMSR-E on EOS-Aqua with some modifications. GCOM-C1 will carry SGLI (GLI F/O). The SGLI will be rather different from GLI. The main targets of SGLI are atmospheric aerosols, coastal zone and land. In order to measure aerosols over both ocean and land, it will have an near ultra violet channel, as well as polarization and bi-directional observation capability. For, coastal zone and land observation, the IFOV of SGLI for these targets will be around 250m. The instrument will be composed of several components. The shorter wavelength region will adopt push broom scanners, while long wave region will use a conventional whisk broom scanner. The orbit of GCOM-W1 is A-train, while the orbit of GCOM-C1 will be similar to ADEOS II.
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GCOM overview
2014 IEEE Geoscience and Remote Sensing Symposium, 2014Co-Authors: Haruhisa ShimodaAbstract:ADEOS II was launched on Dec., 2002. However, after about 10 months operation, it has lost most of its power due to the solar paddle failure. As a follow on of ADEOS II mission, JAXA is now planning GCOM mission which is composed of a series of satellites. They are now called GCOM-W and GCOM-C satellites. Both satellites are composed of 3 satellites with 5 year lifetime. Hence, 13 years of continuous observation can be assured with 1 year overlaps. The first satellite of GCOM-W was launched on 18, May, 2012 while the first one of GCOM-C will be launched in fiscal 2016. GCOM-W1 carries AMSR-2 (AMSR F/O). AMSR-2 is very similar to AMSR on ADEOS II and AMSR-E on EOS-Aqua with some modifications. GCOM-C1 will carry SGLI (GLI F/O). The SGLI will be rather different from GLI. The main targets of SGLI are atmospheric aerosols, coastal zone and land. In order to measure aerosols over both ocean and land, it will have an near ultra violet channel, as well as polarization and bi-directional observation capability. For, coastal zone and land observation, the IFOV of SGLI for these targets will be around 250m. The instrument will be composed of several components. The shorter wavelength region will adopt push broom scanners, while long wave region will use a conventional whisk broom scanner. The orbit of GCOM-W1 is A-train, while the orbit of GCOM-C1 will be similar to ADEOS II.
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Overview of GCOM
2013 IEEE International Geoscience and Remote Sensing Symposium - IGARSS, 2013Co-Authors: Haruhisa ShimodaAbstract:ADEOS II was launched on Dec., 2002. However, after about 10 months operation, it has lost most of its power due to the solar paddle failure. As a follow on of ADEOS II mission, JAXA is now planning GCOM mission which is composed of a series of satellites. They are now called GCOM-W and GCOM-C satellites. Both satellites are composed of 3 satellites with 5 year lifetime. Hence, 13 years of continuous observation can be assured with 1 year overlaps. The first satellite of GCOM-W was launched on 18, May, 2012 while the first one of GCOM-C will be launched in fiscal 2016. GCOM-W1 carries AMSR-2 (AMSR F/O). AMSR-2 is very similar to AMSR on ADEOS II and AMSR-E on EOS-Aqua with some modifications. GCOM-C1 will carry SGLI (GLI F/O). The SGLI will be rather different from GLI. The main targets of SGLI are atmospheric aerosols, coastal zone and land. In order to measure aerosols over both ocean and land, it will have an near ultra violet channel, as well as polarization and bi-directional observation capability. For, coastal zone and land observation, the IFOV of SGLI for these targets will be around 250m. The instrument will be composed of several components. The shorter wavelength region will adopt push broom scanners, while long wave region will use a conventional whisk broom scanner. The orbit of GCOM-W is A-train, while the orbit of GCOM-C will be similar to ADEOS II.
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Overview of GCOM
2012 IEEE International Geoscience and Remote Sensing Symposium, 2012Co-Authors: Haruhisa ShimodaAbstract:ADEOS II was launched on Dec., 2002. However, after about 10 months operation, it has lost most of its power due to the solar paddle failure. As a follow on of ADEOS II mission, JAXA is now planning GCOM mission which is composed of a series of satellites. They are now called GCOM-W and GCOM-C satellites. Both satellites are composed of 3 satellites with 5 year lifetime. Hence, 13 years of continuous observation can be assured with 1 year overlaps. The first satellite of GCOM-W was launched on 18, May, 2012 while the first one of GCOM-C will be launched in fiscal 2015. GCOM-W1 carries AMSR-2 (AMSR F/O). AMSR-2 is very similar to AMSR on ADEOS II and AMSR-E on EOS-Aqua with some modifications. GCOM-C1 will carry SGLI (GLI F/O). The SGLI will be rather different from GLI. The main targets of SGLI are atmospheric aerosols, coastal zone and land. In order to measure aerosols over both ocean and land, it will have an near ultra violet channel, as well as polarization and bi-directional observation capability. For, coastal zone and land observation, the IFOV of SGLI for these targets will be around 250m. The instrument will be composed of several components. The shorter wavelength region will adopt push broom scanners, while long wave region will use a conventional whisk broom scanner. The orbit of GCOM-W will be A-train, while the orbit of GCOM-C will be similar to ADEOS II.
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Global change observation mission
2009 IEEE International Geoscience and Remote Sensing Symposium, 2009Co-Authors: Haruhisa ShimodaAbstract:ADEOS II was launched on Dec, 2002. However, after about 10 months operation, it has lost most of its power due to the solar paddle failure. As a follow on of ADEOS II mission, JAXA is now planning GCOM mission which is composed of a series of satellites. They are now tentatively called GCOM-W and GCOM-C satellites. Both satellites are composed of 3 satellites with 5 year lifetime. Hence, 13 years of continuous observation can be assured with 1 year overlaps. The first satellite of GCOM-W will be launched in 2011 while the first one of GCOM-C will be launched in 2014. GCOM-W will carry AMSR-2 (AMSR F/O). AMSR-2 will be very similar to AMSR on ADEOS II and AMSR-E on EOS-Aqua with some modifications. GCOM-C will carry SGLI (GLI F/O). The SGLI will be rather different from GLI. The main targets of SGLI are atmospheric aerosols, coastal zone and land. In order to measure aerosols over both ocean and land, it will have an near ultra violet channel, as well as polarization and bi-directional observation capability. For, coastal zone and land observation, the IFOV of SGLI for these targets will be around 250 m. The instrument will be composed of several components. The shorter wavelength region will adopt push broom scanners, while long wave region will use a conventional whisk broom scanner. The orbit of GCOM-W will be similar to EOS-Aqua, while the orbit of GCOM-C will be similar to ADEOS II.
G. Jaross - One of the best experts on this subject based on the ideXlab platform.
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toms ADEOS instrument characterization
IEEE Transactions on Geoscience and Remote Sensing, 1999Co-Authors: A.j. Krueger, G. JarossAbstract:Data sets from the total ozone mapping spectrometer (TOMS) on the ADEOS I spacecraft have been processed using initial and time-dependent instrument characterizations. Initial characterizations, performed on the ground, focused on wavelength registration of the six near-UV TOMS channels and on the instrument albedo calibration. Few calibration adjustments were required in the postlaunch phase. Instrument performance, including bandpass wavelengths, were stable throughout the life of the instrument. Indirect evidence exists for small changes in the reflectance of the primary solar diffuser. Characterizations used in data processing assume no change. No ozone retrieval errors are expected due to this assumption. All totaled, estimated calibration uncertainties represent less than 1% in total column ozone uncertainty. A comparison between two TOMS instruments is marginally consistent with these estimates. However, a comparison with ground measurements resulted in differences exceeding 1%.
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TOMS/ADEOS instrument characterization
IEEE Transactions on Geoscience and Remote Sensing, 1999Co-Authors: A.j. Krueger, G. JarossAbstract:Data sets from the total ozone mapping spectrometer (TOMS) on the ADEOS I spacecraft have been processed using initial and time-dependent instrument characterizations. Initial characterizations, performed on the ground, focused on wavelength registration of the six near-UV TOMS channels and on the instrument albedo calibration. Few calibration adjustments were required in the postlaunch phase. Instrument performance, including bandpass wavelengths, were stable throughout the life of the instrument. Indirect evidence exists for small changes in the reflectance of the primary solar diffuser. Characterizations used in data processing assume no change. No ozone retrieval errors are expected due to this assumption. All totaled, estimated calibration uncertainties represent less than 1% in total column ozone uncertainty. A comparison between two TOMS instruments is marginally consistent with these estimates. However, a comparison with ground measurements resulted in differences exceeding 1%.
Nobuyuki Kikuchi - One of the best experts on this subject based on the ideXlab platform.
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on the sciences obtained from ADEOS ii mission
Remote Sensing, 2005Co-Authors: T. Nakajima, Akimasa Sumi, Keiji Imaoka, Nobuyuki KikuchiAbstract:The scientific results, present status, and future plan of the ADEOS-II mission, especially for AMSR and GLI sensor, are presented in the paper. Five specific sensors aboard the ADEOS-II satellite were designed for making overall observation of land, atmosphere, ocean, and cryosphere from the sun-synchronous polar orbit. The AMSR and GLI are two of the primary sensors aboard the ADEOS-II satellite. The AMSR, a microwave scanner, retrieved the physical parameters related to global water cycle such as total precipitable water, cloud liquid water, precipitations and soil moisture. One the other hand, the GLI, a near ultraviolet to infrared imager, had captured many environmental events such as volcano eruptions, forest fires, and dust events with moderate spatial resolution of 250 m or 1 km. It also observed ocean colors, sea surface temperature, vegetation indices, aerosol and cloud properties, and precipitable water over land area. The ADEOS-II science activities continue in future. The primary objective of the next phase is the data utilization toward the future satellite missions, and the synergy of satellite data and climate models.