Predicted Antenna Temperatures Measured by REX/New Horizons During The Pluto’s FlybyProbing the sub-surface in Microwave
International audience The Pluto dwarf planet was observed in details in July 2015 by the New Horizons spacecraft (NASA) during a close-targeted flyby which reavealed surprising and fascinating landscapes with a variety of albedo and chemical composition over the surface. During the flyby, the REX m...
Main Authors: | , , , |
---|---|
Other Authors: | , , , , , , |
Format: | Conference Object |
Language: | English |
Published: |
HAL CCSD
2017
|
Subjects: | |
Online Access: | https://insu.hal.science/insu-01665849 |
id |
ftobservparis:oai:HAL:insu-01665849v1 |
---|---|
record_format |
openpolar |
spelling |
ftobservparis:oai:HAL:insu-01665849v1 2024-05-19T07:48:40+00:00 Predicted Antenna Temperatures Measured by REX/New Horizons During The Pluto’s FlybyProbing the sub-surface in Microwave Leyrat, Cédric Le Gall, Alice Lorenz, Ralph Boomi, Shadi Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS) PLANETO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Johns Hopkins University (JHU) provo, United States 2017-10 https://insu.hal.science/insu-01665849 en eng HAL CCSD insu-01665849 https://insu.hal.science/insu-01665849 BIBCODE: 2017DPS.4921503L 49th Annual Division for Planetary Sciences Meeting https://insu.hal.science/insu-01665849 49th Annual Division for Planetary Sciences Meeting, Oct 2017, provo, United States [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/conferenceObject Conference papers 2017 ftobservparis 2024-04-25T01:37:47Z International audience The Pluto dwarf planet was observed in details in July 2015 by the New Horizons spacecraft (NASA) during a close-targeted flyby which reavealed surprising and fascinating landscapes with a variety of albedo and chemical composition over the surface. During the flyby, the REX microwave instrument was activated in order to measure the antenna temperature while the beam crossed Pluto’s surface. In particular, 3 scans were performed, the first two during few tens of seconds when both the day and night side of Pluto were observed, including the South pole and the last one during an occultation with Earth. We present here predited antenna temperatures considering the known and assumed variations of thermal and electrical properties of the Pluto’s sub-surface. Each scan allow to observe thermal radiation at 4.2 cm wavelength of the surface and subsurface of Pluto, at different locations (latitudes / longitudes). Using a seasonnal thermal model that considers the measured Bond albedo and type of ice, we have modeled the Brightness temperatures that were measured by REX, for different amount of porosity (or thermal inertia). This modeling uses a seasonally-forced thermal model and an emissivity model in the case of circular polarized observations. An antenna temperature if then retrieved assuming a beam pattern for REX. We present here how the antenna temperatures vary with the porosity of the ices obseved. Conference Object South pole Archive de l'Observatoire de Paris (HAL) |
institution |
Open Polar |
collection |
Archive de l'Observatoire de Paris (HAL) |
op_collection_id |
ftobservparis |
language |
English |
topic |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [SDU]Sciences of the Universe [physics] |
spellingShingle |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [SDU]Sciences of the Universe [physics] Leyrat, Cédric Le Gall, Alice Lorenz, Ralph Boomi, Shadi Predicted Antenna Temperatures Measured by REX/New Horizons During The Pluto’s FlybyProbing the sub-surface in Microwave |
topic_facet |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [SDU]Sciences of the Universe [physics] |
description |
International audience The Pluto dwarf planet was observed in details in July 2015 by the New Horizons spacecraft (NASA) during a close-targeted flyby which reavealed surprising and fascinating landscapes with a variety of albedo and chemical composition over the surface. During the flyby, the REX microwave instrument was activated in order to measure the antenna temperature while the beam crossed Pluto’s surface. In particular, 3 scans were performed, the first two during few tens of seconds when both the day and night side of Pluto were observed, including the South pole and the last one during an occultation with Earth. We present here predited antenna temperatures considering the known and assumed variations of thermal and electrical properties of the Pluto’s sub-surface. Each scan allow to observe thermal radiation at 4.2 cm wavelength of the surface and subsurface of Pluto, at different locations (latitudes / longitudes). Using a seasonnal thermal model that considers the measured Bond albedo and type of ice, we have modeled the Brightness temperatures that were measured by REX, for different amount of porosity (or thermal inertia). This modeling uses a seasonally-forced thermal model and an emissivity model in the case of circular polarized observations. An antenna temperature if then retrieved assuming a beam pattern for REX. We present here how the antenna temperatures vary with the porosity of the ices obseved. |
author2 |
Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS) PLANETO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Johns Hopkins University (JHU) |
format |
Conference Object |
author |
Leyrat, Cédric Le Gall, Alice Lorenz, Ralph Boomi, Shadi |
author_facet |
Leyrat, Cédric Le Gall, Alice Lorenz, Ralph Boomi, Shadi |
author_sort |
Leyrat, Cédric |
title |
Predicted Antenna Temperatures Measured by REX/New Horizons During The Pluto’s FlybyProbing the sub-surface in Microwave |
title_short |
Predicted Antenna Temperatures Measured by REX/New Horizons During The Pluto’s FlybyProbing the sub-surface in Microwave |
title_full |
Predicted Antenna Temperatures Measured by REX/New Horizons During The Pluto’s FlybyProbing the sub-surface in Microwave |
title_fullStr |
Predicted Antenna Temperatures Measured by REX/New Horizons During The Pluto’s FlybyProbing the sub-surface in Microwave |
title_full_unstemmed |
Predicted Antenna Temperatures Measured by REX/New Horizons During The Pluto’s FlybyProbing the sub-surface in Microwave |
title_sort |
predicted antenna temperatures measured by rex/new horizons during the pluto’s flybyprobing the sub-surface in microwave |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://insu.hal.science/insu-01665849 |
op_coverage |
provo, United States |
genre |
South pole |
genre_facet |
South pole |
op_source |
49th Annual Division for Planetary Sciences Meeting https://insu.hal.science/insu-01665849 49th Annual Division for Planetary Sciences Meeting, Oct 2017, provo, United States |
op_relation |
insu-01665849 https://insu.hal.science/insu-01665849 BIBCODE: 2017DPS.4921503L |
_version_ |
1799466987500339200 |