Image Simulations for the Advanced Optical Satellite (ALOS-3)

Tadono, Takeo; Oka, Ayano; Watarai, Hitoshi; Takaku, Junichi; Ohgushi, Fumi; Doutsu, Masanori

doi:10.1109/igarss.2018.8517726

Cited by 7 publications

(2 citation statements)

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“…Other examples of data analysis can be found on JAXA EORC (2019). JAXA is currently under developing of ALOS-3 that is a successor ALOS optical mission with finer resolution and wide swath observation (Tadono et al, 2018), and ALOS-4 that is ALOS-2 follow on SAR mission (Okada et al, 2018). Both missions have an objective to contribute safe and secure social including natural disaster responses, and are planned to be launch around Japanese Fiscal Year 2020.…”

Section: Discussionmentioning

confidence: 99%

Summary of Natural Disaster Responses by the Advanced Land Observing Satellite-2 (Alos-2)

Tadono¹,

Ohki²,

Abe³

2019

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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<p><strong>Abstract.</strong> The Advanced Land Observing Satellite-2 (ALOS-2) was launched on May 24, 2014, and it is operating very well in space more than 4.5 years. The designed mission life is five years as nominal operational phase and the target is over seven years since launch the satellite. The mission objectives of ALOS-2 are 1) disaster monitoring, 2) national land and infrastructure information, 3) cultivated area monitoring, and 4) global forest monitoring. To achieve the objectives, ALOS-2 carries on the Phased Array type L-band Synthetic Aperture Radar-2 (PALSAR-2), which is an active microwave radar using the 1.2 GHz frequency band and observes in day and night times even in bad weather conditions as successor PALSAR instrument onboard ALOS satellite operated from 2006 to 2011. PALSAR-2 instrument has several enhanced features from PALSAR e.g. finer spatial resolution, spotlight observing mode, dual-polarisation ScanSAR. This paper summarises an introduction of typical data analysis results for monitoring natural disasters by ALOS-2 during the operational phase. As the response natural disasters, more than 400 times of the emergency observations have been conducted to identify damages caused by volcanic activities, earthquakes, flooding etc. happened in Japan and the World.</p>

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Section: Discussionmentioning

confidence: 99%

Summary of Natural Disaster Responses by the Advanced Land Observing Satellite-2 (Alos-2)

Tadono¹,

Ohki²,

Abe³

2019

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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“…To response this requirement, several emergency observation modes are prepared in ALOS-3 operation i.e. the point observation, the observation direction changing, and the wide area observation (Tadono et al, 2018). For analysing the acquired data, this is basically a change detection between before and after the event, therefore it is important to observe the area and archive the data in before the event as well.…”

Section: Safe and Secure Social Including Provision For Natural Disasmentioning

confidence: 99%

Calibration and Validation of the Advanced Land Observing Satellite-3 “Alos-3”

Tadono¹,

Mizukami²,

Watarai³

et al. 2020

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Abstract. The “Advanced Land Observing Satellite-3” (ALOS-3, nicknamed “DAICHI-3”) is the next high-resolution optical mission as a successor of the optical mission by the Advanced Land Observing Satellite (ALOS, “DAICHI”) in Japan Aerospace Exploration Agency (JAXA), and will be launched in Japanese Fiscal Year 2020. ALOS-3 is now under developing the flight model. The major missions of ALOS-3 are (1) to contribute safe and secure social including provision for natural disasters, and (2) to create and update geospatial information in land and coastal areas. To achieve the missions, the “WIde-Swath and High-resolution optical imager” (WISH, as a tentative name) is mounted on ALOS-3, which consists of the high-resolution panchromatic- and multispectral-bands.This paper introduces the overview of ALOS-3’s mission and the calibration and validation plan at JAXA. The standard product is the system corrected data using the sensor models, which will be provided from the sensor development team. Therefore, the sensor calibration is directly affected to the accuracies of the standard product. In addition, the sensor model based the Rational Polynomial Coefficient will be contained with level 1B2 standard product that can be used to process an ortho rectification and three-dimensional measurement from ALOS-3 images. As the target accuracy of WISH’s standard products, the geometric accuracies are less than 5 m in horizontal without ground control point (GCP), and 1.25 m in horizontal and 2.5 m in vertical with GCPs (1 sigma), and the radiometric accuracy is ± 10 % as absolutely and ± 5 % as relatively for multispectral band.

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