Space Weather Workshop

Boulder, Colorado
April 26, 2011 - April 29, 2011

We invite you to meet with AER scientists focused on the science and impacts of solar flares and CMEs while at Space Weather Week.

Scientists attending from Atmospheric and Environmental Research.  Contact us to arrange a conversation.

Ron Isaacs
Nelson A. Bonito
Nicole Homeier, PhD
Pamela A. Puhl-Quinn, PhD
Richard A. Quinn, PhD
Hilary E. Snell, PhD

AER presentations at Space Weather Week 2011:

Space Environment and Effects Tool for STK (STK-SEET)

Abstract: AER’s Space Environment and Effects Tool (SEET) provides extensive modeling of the near-Earth space environment, with the capability to predict various effects on space vehicles, in conjunction with AGI’s STK software. SEET’s functionality is provided by five components consisting of scientific models of the space environment, including: Radiation Environment, South-Atlantic-Anomaly (SAA) Transit, Particle Impacts, Vehicle Temperature, and Magnetic Fields. These components, which are largely derived from models used in the Air Force Research Laboratory's AF-GeoSpace model suite, are seamlessly integrated into the overall STK user interface and fully accessible through STK-Engine as well. Here, a brief overview of the components is given, along with a more detailed technical review of two of the primary ones, SAA-Transit and Radiation Environment. The South Atlantic Anomaly (SAA) is a near-Earth region of highly energetic charged particles which can easily penetrate spacecraft and create negative impacts (single-event upsets or SEUs) on internal electronics. The broader radiation environment, here referring specifically to the trapped radiation or Van Allen belts, contributes to longer term degradation of spacecraft components due to cumulative dosing effects. This tool is especially useful for satellite design and mission planning applications.

Authors: Richard A. Quinn, Paul P. Whelan, Christopher J. Roth, Plamen Krastev, and Nelson A. Bonito

GOES-R Charged Particle Detectors: A discussion of their capabilities, and the realistic flux spectra they’re likely to encounter at geosynchronous orbit

Abstract: The GOES-R Space Environment In-Situ Suite (SEISS) is a set of instruments that provide charged particle measurements at geosynchronous orbit. The GOES-R SEISS consists of three instrument sets: 1) Magnetospheric Particle Sensor Low and High (MPS-LO and MPS-HI), 2) Solar and Galactic Proton Sensor (SGPS-X and SGPS+X; two units provide full coverage) and 3) Energetic Heavy Ion Sensor (EHIS). The sensors measure electron, proton and heavy ion (Li through Ni) count rates. Measurements are made over broad energy and angular ranges unique to each sensor. This paper will discuss the comparison between GOES-R and GOES-N series capabilities. The GOES-R Ground Segment (GS) Product Generation (PG) Element will implement calibration algorithms (provided by the SEISS Instrument Vendor) which convert the count rates to fluxes. The calibrated data will be packaged as SEISS “L1b” product data. Testing of the calibration algorithms is necessary to ensure proper implementation. The creation of synthetic sensor data by the Core GS team to be used for testing purposes is a risk reduction activity currently underway. This paper will discuss realistic flux spectra, and how they are converted to raw count rates. The conversion process involves calculations related to viewing geometry, out-of-band particle contamination and sensor “dead” time corrections.

Authors: P. A. Puhl-Quinn (AER) and J. Rodriguez (University of Colorado, CIRES)