نتایج جستجو برای: landsat 8

تعداد نتایج: 661911  

Journal: :International Journal of Engineering & Technology 2018

2015
Khaled Hazaymeh Quazi K. Hassan

Here, our objective was to develop a spatio-temporal image fusion model (STI-FM) for enhancing temporal resolution of Landsat-8 land surface temperature (LST) images by fusing LST images acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS); and implement the developed algorithm over a heterogeneous semi-arid study area in Jordan, Middle East. The STI-FM technique consisted of t...

ژورنال: :سنجش از دور و gis ایران 0
سید باقر فاطمی استادیار، گروه مهندسی نقشه برداری، دانشکدة مهندسی عمران و حمل ونقل، دانشگاه اصفهان فاطمه صدقی دانشجوی کارشناسی ارشد سنجش از دور، گروه مهندسی نقشه برداری، دانشکدة مهندسی عمران و حمل ونقل، دانشگاه اصفهان

یکی از موضوعات مهم در محاسبه شاخص های گیاهی کمیتی است که شاخص براساس آن محاسبه می شود. نوع کمیت انتخابی می تواند مقدار پیکسل، بازتابش و بازتابندگی باشد. بررسی تفاوت مقادیر شاخص های گیاهی محاسبه شده از این کمیت ها چه بسا راهگشای ساده ترکردن محاسبات مربوط به شاخص ها و نیز وضوح بخشیدن به نتایج حاصل از انتخاب هریک از کمیت ها شود. در تحقیقات گذشته، معمولاً یک شاخص گیاهی خاص بررسی شده است و اثر پوشش ز...

Journal: :Remote Sensing 2016
Emanuele Mandanici Gabriele Bitelli

The availability of new generation multispectral sensors of the Landsat 8 and Sentinel-2 satellite platforms offers unprecedented opportunities for long-term high-frequency monitoring applications. The present letter aims at highlighting some potentials and challenges deriving from the spectral and spatial characteristics of the two instruments. Some comparisons between corresponding bands and ...

Journal: :Remote Sensing 2016
Yinghai Ke Jungho Im Seonyoung Park Huili Gong

This study presented a MODIS 8-day 1 km evapotranspiration (ET) downscaling method based on Landsat 8 data (30 m) and machine learning approaches. Eleven indicators including albedo, land surface temperature (LST), and vegetation indices (VIs) derived from Landsat 8 data were first upscaled to 1 km resolution. Machine learning algorithms including Support Vector Regression (SVR), Cubist, and Ra...

2016
Brian L. Markham Del Jenstrom Jeffrey G. Masek Philip W. Dabney Jeffrey A. Pedelty Julia A. Barsi Matthew Montanaro

The Landsat 9 mission, currently under development and proceeding towards a targeted launch in late 2020, will be very similar to the Landsat 8 mission, launched in 2013. Like Landsat 8, Landsat 9 is a joint effort between NASA and USGS with two sensors, the Operational Land Imager 2 (OLI-2), essentially a copy of the OLI on Landsat 8 and the Thermal Infrared Sensor 2 (TIRS-2), very similar to ...

Journal: :Remote Sensing 2015
Brian L. Markham James C. Storey Ron Morfitt

1 NASA/GSFC, Code 618, Greenbelt, MD 20771, USA; E-Mail: [email protected]; Tel.: +1-301-614-6608 2 Stinger Ghaffarian Technologies (SGT), Technical Support Services Contractor to USGS EROS, NASA/GSFC Mail Code 618, Greenbelt, MD 20771, USA; E-Mail: [email protected]; Tel.: +1-301-614-6683 3 USGS Earth Resources Observation and Science (EROS) Center, 47914 252nd Street, Sioux Falls...

Journal: :Remote Sensing 2017
Jeremie Mouginot Eric J. M. Rignot Bernd Scheuchl Romain Millan

Satellite remote sensing data including Landsat-8 (optical), Sentinel-1, and RADARSAT-2 (synthetic aperture radar (SAR) missions) have recently become routinely available for large scale ice velocity mapping of ice sheets in Greenland and Antarctica. These datasets are too large in size to be processed and calibrated manually as done in the past. Here, we describe a methodology to process the S...

2016
Kohei Arai Masanori Sakashita

Cirrus cloud detection accuracy of GOSAT/CAI and Landsat-8 is evaluated with a ground based Laser Radar: Lidar data and sky view camera data. Also, the evaluation results are confirmed with Calipso data together with a topographic representation of vertical profile of cloud structure. Furthermore, origin of cirrus clouds is estimated with forward trajectory analysis. The results show that GOSAT...

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