Jeff Piepmeier

The Black Hole Explorer: astrophysics mission concept engineering study report

Eliad Peretz, Peter L. Kurczynski, Michael D. Johnson, Janice Houston et autres

The Black Hole Explorer (BHEX) mission will enable the study of the fine photon ring structure, aiming to reveal the clear universal signatures of multiple photon orbits and true tests of general relativity, while also giving astronomers access to a much greater …

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Australian-Developed Hyperspectral Microwave Sounder Pathfinder Mission to Support Global Temperature and Humidity Monitoring: Pre-Phase A Study

Anthony Kremor, Cameron L. Seidel, Jai Vennik, Michael McKinnell et autres

This work reports on the Microwave Sounder Mission Pathfinder (MSM-PF) Pre-Phase A Study and subsequent work completed at the Australian National Concurrent Design Facility (ANCDF) by UNSW Canberra Space on the 11 – 14th October 2022 in Canberra, Australia, on behalf of …

Australian-Developed Hyperspectral Microwave Sounder Pathfinder Mission to Support Global Temperature and Humidity Monitoring: Pre-Phase A Study

Anthony Kremor, Cameron L. Seidel, Jai Vennik, Michael McKinnell et autres

This work reports on the Microwave Sounder Mission Pathfinder (MSM-PF) Pre-Phase A Study and subsequent work completed at the Australian National Concurrent Design Facility (ANCDF) by UNSW Canberra Space on the 11 – 14th October 2022 in Canberra, Australia, on behalf of …

The Event Horizon Explorer mission concept

Peter L. Kurczynski, Michael D. Johnson, Sheperd S. Doeleman, Kari Haworth et autres

The Event Horizon Explorer (EHE) is a mission concept to extend the Event Horizon Telescope via an additional space-based node. We provide highlights and overview of a concept study to explore the feasibility of such a mission. We present science goals and …

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The Atmosphere Observing System (AOS): A core component of NASA's Earth System Observatory (ESO)

Deborah G. Vane, Vickie Moran, Jeff Piepmeier, Scott A. Braun et autres

The Atmosphere Observing System (AOS) mission, formerly called Aerosol, Clouds, Convection and Precipitation (ACCP), is a component of NASA's Earth System Observatory (ESO). The AOS mission combines two high-priority missions called for in the 2017–2027 Decadal Survey (DS)1of Earth Science and Applications …

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Water/land contamination correction

Julián Chaubell, Simon H Yueh, Scott E. Dunbar, Steven C. Chan et autres

Pointing and geolocation for the SMAP Passive instrument

Giovanni De Amici, Jeff Piepmeier, Derek Hudson, Jinzheng Peng

We present an assessment of the precision of the pointing and geolocation of the SMAP (Soil Moisture Actice and Passive) satellite's passive instrument, based on the first year of on-orbit operation. The SMAP radiometer has an effective footprint of 39-by-47 km (HPBW) …

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Status of the Signals of Opportunity Airborne Demonstrator (SoOp-AD)

Jim Garrison, Yao‐Cheng Lin, Jeff Piepmeier, J. J. Knuble et autres

Root zone soil moisture (RZSM) is not directly measured by any current satellite instrument, despite its importance as a key link between surface hydrology and deeper processes. Presently, model assimilation of surface measurements or indirect estimates using other methods must be used …

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Preliminary results from the soil moisture active/passive (SMAP) radiometer digital electronics engineering test unit (ETU)

Damon Bradley, Cliff Brambora, Ali Mohammad Feizi, Rafael A. García et autres

SMAP is one of four Tier-1 missions recommended by the National Research Council's Committee on Earth Science and Applications from Space [1]. The mission consists of a spacecraft with two instruments: an active L-band 1.26 GHz synthetic aperture radar and a passive …

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Architecture and design of the aquarius instrument for RF and thermal stability

D. McWatters, A. P. Freedman, Ray Becker, James Granger et autres

In this paper, we present the architecture and design of the aquarius instrument: a spaceborne combination radiometer-scatterometer in L-band, for measuring ocean surface salinity. In order to achieve the unprecedented measurement stability of 0.1 Kelvin for the radiometer, the scatterometer (for correction …

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A Common Calibration Source Framework for Fully-Polarimetric and Interferometric Radiometers

Edward Kim, Brynmor J. Davis, Jeff Piepmeier, Dorothy J. Zukor

Two types of microwave radiometry--synthetic thinned array radiometry (STAR) and fully-polarimetric (FP) radiometry--have received increasing attention during the last several years. STAR radiometers offer a technological solution to achieving high spatial resolution imaging from orbit without requiring a filled aperture or a …

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