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The Advanced Thermal Emission and Reflection Radiometer (ASTER) is a research facility instrument on NASA’s Terra spacecraft. We celebrated the 20th anniversary of ASTER’s launch in December 1999. ASTER has been providing high spatial resolution multispectral data in the VNIR, SWIR, and TIR regions, and along-track stereo data. Starting April 2016, ASTER data have been distributed to the public at no cost. Another important and the most popular data set is the ASTER Global DEM, which covers almost the entire land surface at a 30 m grid size. ASTER data have been widely used in a variety of application areas such as land surface mapping and change detection, volcano and other natural hazard monitoring, mineral exploration, and urban heat island monitoring. This Special Issue consists of 12 papers (2 reviews, 9 articles, and 1 technical note) and covers topics including development of new techniques to process ASTER data, calibration activities to ensure long-term consistency of ASTER data, validation of the ASTER data products, and scientific achievements using ASTER data.

emissivity --- n/a --- vicarious calibration --- digital elevation model --- optical sensor --- loess --- Terra ASTER --- land-surface temperature --- lithological mapping --- sediment transport pathways --- Mosaic --- validation --- thermal infrared --- Terra MODIS --- True Color imagery --- ASTER multispectral data --- fluvial --- water body detection --- morphology --- MOD35 --- lunar calibration --- cloud coverage --- volcanic processes --- Wudalianchi volcano --- Ming Dynasty --- Artificial Neural Network --- permafrost --- ASTER --- Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) --- stereo --- erosion --- Mako --- geologic mapping --- Algodones --- future concepts --- 3D perspective view --- observation scheduler --- earthen Great Wall --- thermal infrared data --- lithology --- mineral exploration --- VNIR --- cloud mask --- cloud avoidance --- aeolian --- phase change --- mission operations --- temperature --- global database --- zero curtain effect --- image archive --- mineral system --- deposition --- DEM --- MODIS --- success rate --- uncertain flag --- TES algorithm --- ASTER instrument --- radiometric calibration --- mineral mapping --- atmospheric correction --- TIR

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This volume celebrates the 30th anniversary of the first very-high energy (VHE) gamma-ray Source detection: the Crab Nebula, observed by the pioneering ground-based Cherenkov telescope Whipple, at teraelectronvolts (TeV) energies, in 1989. As we entered a new era in TeV astronomy, with the imminent start of operations of the Cherenkov Telescope Array (CTA) and new facilities such as LHAASO and the proposed Southern Wide-Field Gamma-ray Observatory (SWGO), we conceived of this volume as a broad reflection on how far we have evolved in the astrophysics topics that dominated the field of TeV astronomy for much of recent history.In the past two decades, H.E.S.S., MAGIC and VERITAS pushed the field of TeV astronomy, consolidating the field of TeV astrophysics, from few to hundreds of TeV emitters. Today, this is a mature field, covering almost every topic of modern astrophysics. TeV astrophysics is also at the center of the multi-messenger astrophysics revolution, as the extreme photon energies involved provide an effective probe in cosmic-ray acceleration, propagation and interaction, in dark matter and exotic physics searches. The improvement that CTA will carry forward and the fact that CTA will operate as the first open observatory in the field, mean that gamma-ray astronomy is about to enter a new precision and productive era.This book aims to serve as an introduction to the field and its state of the art, presenting a series of authoritative reviews on a broad range of topics in which TeV astronomy provided essential contributions, and where some of the most relevant questions for future research lie.

Research & information: general --- Mathematics & science --- gamma ray astronomy --- imaging atmospheric Cherenkov technique --- TeV gamma-rays --- non-thermal radiation --- keV-TeV cosmic sources --- INTEGRAL legacy data base --- relativistic astrophysics --- gamma rays --- cosmic rays --- interstellar medium --- Milky Way --- galaxies --- radiation mechanisms: non-thermal --- high energy astrophysics --- background radiation --- photon–photon interaction --- pair production --- axion-like particles --- gamma-rays --- IACTs --- intergalactic magnetic fields --- high-energy gamma rays --- electromagnetic cascades --- pevatrons --- Galactic cosmic rays --- PeVatron --- Crab Nebula --- angular resolution --- energy spectral distribution --- γ-ray astronomy --- very-high-energy gamma-ray astrophysics --- astroparticle physics --- imaging atmospheric Cherenkov telescopes --- Quantum Gravity --- Lorentz invariance violation --- time of flight --- modified photon interactions --- very-high-energy gamma-ray astronomy --- open science --- data format --- multi-messenger --- real-time --- high-energy --- alerts --- very-high-energy γ-ray astronomy --- atmospheric Cherenkov telescopes --- source catalogues --- gamma-ray astronomy --- Cherenkov telescopes --- ISM: supernova remnants --- ISM: individual objects—Crab Nebula --- pulsars: general --- radiation mechanisms: nonthermal --- gamma rays: general --- acceleration of particles --- astrophysical plasmas --- MHD --- high-energy gamma-ray astrophysics --- Gamma-ray bursts --- non-thermal emission --- radiative processes --- very-high energy Gamma-rays --- statistical analysis --- likelihood --- bayes --- imaging atmospheric Cherenkov telescope --- IACT --- IACT technology --- very high energy gamma-ray telescope --- ground-based gamma-ray astrophysics --- n/a --- photon-photon interaction --- ISM: individual objects-Crab Nebula