Space Weather System-Impact Products SSA Environmental Effects Fusion System - (SEEFS) Overview – For NESSC 14 Oct 2009 Stephen Quigley AFRL/RVBX

Outline General Overview FY04-06 Products Future Products Input Data Requirements Status

SEEFS Overview - General SEEFS is an AFSPC sponsored program SEEFS = Products + Architecture + Database SEEFS combines environmental info with system specs and thresholds to produce system-impact products outputs SEEFS was designed to provide real-time support SEEFS is situated as a pseudo stand-alone system with multiple target integrations being pursued –Distributed Mission Operations – Space (DMO-S): For training/exercises –Air Force Weather Agency (AFWA/SWOC): 3/5 on SMC “ops” Testbed –Joint Space Operations Center (JSpOC): for DoD asset ops SSA –Maui High Performance Computer Center (MHPCC): For distributed processing And others that can be considered –Defense Threat Reduction Agency (DTRA) –NASA SEEFS is expected to be a net-centric application SEEFS to be separated into environmental and system-impact pieces

SEEFS Overview - Prototypes Completed (FY04-05) ProductsDelivered to SMC from AFRL SoRBE Solar Radio Burst Effects RAC II Radar Auroral Clutter RadScint Radar Scintillation SatScint Satcom Scintillation Char/D Satellite Charge/Discharge –The current version of SEEFS is prototype –An operational version is nearly complete at SMC SYAG –SEEFS output is in graphical and consolidated text formats Conout.txt allows for machine-to-machine (MtM) uses –SEEFS includes nowcast & forecast capabilities –SEEFS includes confidence levels

Solar Radio Burst Effects (SoRBE) Product Requires solar radio data –Currently RSTN Requires radar & SATCOM receiver specs & thresholds

SoRBE The Problem - RFI

SEEFS Products – SoRBE Map View Product – SATCOM Example The Overhead or Map View product provides all relevant solar RFI info for a given radar or SATCOM receiver site, with 3-D effects projected onto a 2-D map. SATCOM solar RFI effects are determined by comparison of solar output with receiver thresholds provided directly. Confidence Levels 60-99%

SEEFS Products – SoRBE Scope View Product – Radar Example The Scope or Az/El plot view product provides all relevant solar RFI info for a given radar or SATCOM receiver site, with 3-D effects plotted onto Az vs. El and Az vs. Range plots. Radar solar RFI effects are determined by comparison of solar output with range- dependent receiver thresholds calculated for each site using the radar range equation. A single/standar d m 2 target size (RCS) is assumed.

SEEFS Products – SoRBE Confidence Levels The initial SoRBE product has confidence level estimates dependent on the fan of operation, local time, solar activity and input data quality, amount of frequency interpolation, and receiver lobe configuration. Confidence level information is shown in pop-up table format. Confidence Levels 60-99%

Radar Auroral Clutter (RAC) Product Requires clutter-effective auroral & SAPS data –Currently via Kp driven boundaries from ground magnetometer or DMSP SSJ/4 data Requires radar specs Uses Hardy Auroral Oval and Electron Density models; also uses SAPS model based on John Foster’s SAPS climatology/statistics

Radar Auroral Clutter The Problem Auroral “clutter” is feedback on radar due to dynamic fields and precipitating energetic particles in the aurora and sub-auroral polarization stream (SAPS). It occurs where: –the radar signal beam and geomagnetic field lines are perpendicular –and auroral particle currents or SAPS strength is substantial It can result in false observations of targets (1 obs), tracks (2+ obs), even anomalous launch or impacts (enough obs for the calculation) Magnetic field lines (grey) with auroral precipitation (green) and sub-auroral polarization stream (purple) Straight-line radar signal propagation 10,000 False Targets in 3 hours - Max at 0 o aspect angle +/- 4 o.

SEEFS Products – RAC Map View Product The Overhead or Map View product provides all relevant auroral and SAPS clutter information for a given radar site, with 3-D effects projected onto a 2-D map.

SEEFS Products – RAC Map View (Zoomed) Product The enlarged Map View of RAC provides 3-D information via the addition of elevation angle contour lines.

SEEFS Products – RAC Scope View Product The Scope or Az/El plot view product provides all relevant auroral and SAPS clutter information for a given radar site, with 3-D effects plotted onto Az vs. El and Az vs. Range plots.

SEEFS Products – RAC Confidence Levels The initial RAC product has confidence level estimates dependent on the fan of operation, location with respect to the potential clutter zone (PCZ), input data type, and input data age. Confidence level information is shown in a pop-up box in the above example. Confidence Levels 68-99%

Satellite & Radar Scintillation (SatScint & RadScint) Products –Requires scintillation & indices (Kp & SSN) data Currently via SCINDA obs and Kp/SSN –Requires SATCOM & radar receiver specs & thresholds –Uses SCINDA models for real-time obs applications in SatScint; uses WBMOD for climatology applications in SatScint and RadScint

Scintillation The Problem SATCOM Receiver Radar Receiver Ionospheric density gradients can distort a SATCOM or radar signal traversing it to/from a satellite or target Ionosphere Ionospheric Scintillation Aurora or “Bubbles”

SEEFS Products – SatScint Map View w/Confidence Link Confidence Levels 47-92% After choosing the Geosynchronous SATCOM satellite and frequency of interest, the Map View for SatScint depicts scintillation-based signal fading for ground-level locations that might communicate with that satellite. Confidence levels for this product are depicted as a correlated pop-up image, with values highly dependent on input data age and distance of a point from the scintillation sensors.

SEEFS Products – SatScint Point-to-Point (PtP) Product w/confidence Confidence Levels 58-95% Link Thresholds Severe Moderate Scintillation Legends Real Time Model Climo Model Point-to-Point Link: TestSat1 (150E) to GroundSiteX (12N, 100E) PtP After choosing the Geosynch SATCOM satellite and freq and a specific ground SATCOM site’s location, SatScint’s PtP time plot depicts scintillation- based signal fading for that specific satellite- to-ground link. Confidence levels for this product are plotted below the main plot.

Auroral Scintillation Boundary Observation of RCS scintillation at the Fylingdales radar. Scintillation The Problem – Radar – DoD Example

SEEFS Products – RadScint Map View Product The Overhead or Map View product provides relevant climatology model- based predictions of ionospheric scintillation-caused dB fading for a given radar site’s returns. The user chooses from various operating frequency and altitude slice options; results are projected onto a 2-D map.

SEEFS Products – RadScint Az/El Polar & Scope View Plot Products The Az/El Polar and Scope View products provide for alternative “3-D” views of the same radar scintillation predictions. The user still chooses from various operating frequency and altitude slice options.

The RadScint product has confidence level estimates dependent on the altitude, elevation angle, and input data age. Confidence level information is shown in a separately linked image in the above example. Confidence Levels % SEEFS Products – RadScint Confidence Levels

Satellite Charge/Discharge (Char/D) Products Requires magnetospheric particle data & indices –Currently via GOES, LANL, ground-based neutron monitor, POES BI and Kp Requires satellite orbit, specs & thresholds Uses Magnetopheric Specification Model (MSM), Koons-Gorney Energetic Electron Model, Korth MPA Data Model, CRRES Electron Radiation Belt Model, Hardy Auroral Model, and SOPA/GOES Survey Model, along with NASA’s Spacecraft Charging Analysis Program (NASCAP 2K)

Satellite Charge/Discharge The Problem Under certain conditions, energetic electrons can buildup on or in a satellite, resulting in satellite charging. If charging is substantial AND a discharge mechanism exists, the resulting discharge can cause physical damage and/or phantom commands to the satellite. Surface charging takes place rapidly, and is due primarily to eV – KeV electron fluxes. Deep (internal) charging takes hours to days, and is due to MeV electron fluxes/fluences.

Satellite Char/D Products Surface Charging – Charging/Voltage Plot The Surface Char/D product is comprised of three output plots. The first (1) shows the predicted surface charging state of the satellite. The second (2) shows the predicted surface discharge state. For the initial product, only entry or exit from eclipse is used as a discharge mechanism. The third (3) shows the overall confidence level of the previous two combined

Satellite Char/D Products Deep Charging - Multi-plot The Deep Char/D product provides a single, multi-plot output showing the predicted states/ conditions for (1) deep charging, (2) deep discharging and the (3) confidence level, all on one image.

Included in all products –Text output file of all information –Best allowance for MTM To be combined –All radar effects products –All SATCOM effects products –All satellite effects products Ultimately an automated satellite anomaly assessment product/report in near real time Already integrated –All SEEFS product effects are combined into a single, higher-level “Decision Aid” that quantifies & qualifies the total effect of all product output on a given asset (site) and mission (grouping of assets). –This is the SEEFS Decision Aid product (examples on following slides) Allows for any combination of assets (radar, SATCOM, satellite) to build a mission Incorporates business rules for site and mission status Provides stoplight charts with product drill-downs SEEFS Products Combinations & Decision Aids

SEEFS Products Decision Aid – 1 (Top Menu)

SEEFS Products Decision Aid – 2 (Mission Selection)

SEEFS Products Decision Aid – 3 (Global View)

SEEFS Products Decision Aid – 4 (Stoplight Chart) - Individual asset effects levels will be based on asset/system specific thresholds. - Combined assets (“Global View”) effect levels will be based on specified mission thresholds.

SEEFS Products Decision Aid – 5 (Products Drill-Down)

SEEFS Products Decision Aid – 6 (Lower Product Views)

SEEFS Status - Development & Deliveries Current SEEFS effort is to operationalize the existing products and link them programmatically Spiral 1 (prototype SoRBE & Architecture) –Delivered to SSA test bed & Ops Eval done – Mar 2005 Spiral 2A (All 5 prototypes & DA & new Architecture/DB) –Delivered and Ops Eval completed – Mar 2006 –Delivered to MHPCC for potential parallelization –Delivered to Portion to DMO-S (Schriever AFB) Spiral 2B (operational version of all) –Code rewrites and requirements docs work finishing up NOW –SMC/SYAG ops testbed deliveries to AFWA Initial radar products (RAC, SoRBE, RadScint) to testbed in Aug 2008 Second delivery (SatScint & Char/D) to testbed expected in Dec 2009 –Return (re-written “baseline”) delivery to AFRL/RVBX ~ Jan 2010

SEEFS Operational Evaluation March 2006

SEEFS Future Work Depending on requirements and funding, future SEEFS work will focus on one or more of the following: –Validation of current products: note JHU/APL for RAC –Upgrades to current products: SoRBE, RAC, RadScint, SatScint, Char/D, and the Decision Aid –New product development, especially low-hanging fruit… High-Energy Proton Effects as a Satellite Single Event Upsets and Events (SEUPE) product –Includes existing South Atlantic Anomaly (SAA) maps GPS Dual-Frequency Errors (Scintillation) Meteor Effects (ME) - Impact, Sighting, Radar Clutter, Bolides Tropospheric Effects Man-Made Environment Effects (Nukes, engine burns, METOX, etc) –Data Fusion

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