Colorado Student Space Weather Experiment

Last updated
CSSWE
CSSWE CubeSat and PPOD prior to integration.png
CSSWE (foreground) and P-POD Deployer prior to integration [1]
Mission type Space weather research
Operator CU/LASP
COSPAR ID 2012-048D OOjs UI icon edit-ltr-progressive.svg
SATCAT no. 38761
Website lasp.colorado.edu/home/csswe/
Mission duration3 months (planned)
24+ months (achieved)
Spacecraft properties
Spacecraft type3U CubeSat
Start of mission
Launch dateSeptember 13, 2012, 21:39:00 (2012-09-13UTC21:39Z) UTC
Rocket Atlas V 401 AV-033
Launch site Vandenberg SLC-3E
Contractor United Launch Alliance
Entered serviceOctober 4, 2012
Orbital parameters
Reference system Geocentric
Regime Low Earth
Perigee altitude 472 kilometers (293 mi)
Apogee altitude 777 kilometers (483 mi)
Inclination 64.6 degrees
Period 97.19 minutes
Epoch September 14, 2012 [2]
Instruments
REPTile - Relativistic Electron and Proton Telescope integrated little experiment
 

Colorado Student Space Weather Experiment (CSSWE) was the sixth[ when? ] National Science Foundation sponsored CubeSat mission. [3] [4] It was built by students at the University of Colorado at Boulder with advising from professionals at the Laboratory for Atmospheric and Space Physics. The CSSWE mission was a joint effort by the University of Colorado's Department of Aerospace Engineering Sciences and Laboratory for Atmospheric and Space Physics. The mission principal investigator was Prof. Xinlin Li, and the Co-PIs are Prof. Scott Palo and Dr. Shri Kanekal. The project manager for the project was Dr. Lauren Blum, the system engineer was Dr. David Gerhardt, and the instrument scientist was Dr. Quintin Schiller. [5]

Contents

CSSWE launched on September 13, 2012, on an Atlas V rocket by the United Launch Alliance on ELaNa-VI as part of the NASA's CubeSat Launch Initiative (CSLI). [6] The CSSWE team released its science products to the public for download on NASA's Coordinated Data Analysis Web Site (CDAWeb).

As of December 22, 2014, CSSWE showed severe battery degradation, likely due to pushing the battery thousands of cycles beyond the battery's design specs. As a result, CSSWE cannot retain enough power to receive or transmit data.

Mission Objective

CSSWE's mission objective is to study space weather from a near-Earth orbit (480 km x 780 km). [7] Specifically, CSSWE works in conjunction with concurrent missions (such as the Van Allen Probes, BARREL, and SAMPEX) to address the following questions: 1) How does solar flare location, magnitude, and frequency relate to the timing, duration, and energy spectrum of solar energetic particles (SEPs) reaching Earth and 2) How the spectrum and dynamics of Earth's radiation belt electrons evolve. [8]

Science Instrument

CSSWE's science instrument, the Relativistic Electron and Proton Telescope integrated little experiment (REPTile), is the only science instrument aboard and meets the mission objectives. It is a scaled-down version of the Relativistic Electron and Proton Telescope (REPT) instrument, [7] which is part of the Energetic Particle, Composition, and Thermal Plasma (ECT) Instrument Suite [9] on board the Van Allen Probes. REPTile fulfills the mission objectives by measuring electrons from 0.58 to >3.8 Megaelectronvolts (MeV) and protons from 8 to 40 MeV. [10] [11] [12] Also on the CubeSat is an onboard magnetometer to provide knowledge of spacecraft and instrument orientation with respect to Earth's magnetic field.

Pre-Flight Testing

CSSWE underwent the same rigorous testing that all space-based assets at LASP do. In addition to component and subsystem level testing, the spacecraft underwent numerous system level tests. It passed the thermal vacuum chamber test, in which 11 orbital cycles of the spacecraft were simulated in vacuum by increasing and decreasing the spacecraft temperature to reproduce thermal models which predict actual on-orbit temperatures. The first few hours of the mission were reproduced by simulating launch (in which the deployment switch is released, initiating automated commissioning phase) from a mesa nearby the LASP ground station. CSSWE passed this test by completing the initial commissioning phase, deploying its antenna, and establishing contact with the LASP ground station. Orbital attitude tests were performed as well, including Helmholtz cage and error ellipse tests.

Launch

CSSWE was originally scheduled to launch on August 2, 2012 aboard the National Reconnaissance Office Launch-36 (NROL-36). However, the launch was delayed three times to provide additional time for resolution of a range instrumentation issue, according to the United Launch Alliance official statement. [13] The Atlas V 401 eventually launched on September 13, 2012 from Vandenberg AFB Space Launch Complex 3. [14] [15]

The primary payload aboard NROL-36 was a classified NRO payload, so no spacecraft or orbit information was provided. However, there were 11 CubeSats on board the rocket as secondary payloads. The launch vehicle delivered the CubeSats into a 480x780 km orbit with an inclination of 65 degrees. The CubeSats were carried in eight PPOD dispensers attached to the end of the Centaur rocket via the Aft Bulkhead Carrier, which replaced an unnecessary Helium tank. [13] Four of the CubeSats were launched as part of the NASA's Educational Launch of Nanosatellites (ELaNa) program - CSSWE (University of Colorado - Boulder), CINEMA 1 (University of California - Berkeley et al.), CXBN (Morehead State University), and CP5 (California Polytechnic University). The remaining seven were Aeneas (operated by the University of Southern California), two SMDC-ONE (US Army), STARE-A (Lawrence Livermore National Laboratory), and three AeroCube-4 (Aerospace Corporation). [16]

An artistic rendition of how CSSWE would appear on orbit. CSSWE On Orbit.png
An artistic rendition of how CSSWE would appear on orbit.

On Orbit Success

The spacecraft uses a measuring tape as an antenna to communicate with ground stations. CSSWE was first heard beaconing telemetry packets by amateur radio operator call sign DK3WN almost exactly two hours after deployment from the PPOD, overcoming its first major hurdle. The spacecraft completed science commissioning and was commanded into full science mode 22 days later on October 5. Full mission success occurred on January 5, 2013 after three months of science data. The CSSWE mission ended in December 2014 due to battery degradation.

The first science results and updated science results were presented, respectively, at the 2012 and 2013 Fall American Geophysical Union in San Francisco, CA. [17] and published in peer-reviewed Journals such as Geophysical Review Letters, [18] [19] the Journal of Geophysical Research, [20] and Science. CSSWE now has 24 associated peer-reviewed scientific or engineering journal publications, including a paper published in Nature on 13 December 2017. [21]

Related Research Articles

<span class="mw-page-title-main">Laboratory for Atmospheric and Space Physics</span> Research organization at the University of Colorado Boulder

The Laboratory for Atmospheric and Space Physics (LASP) is a research organization at the University of Colorado Boulder. LASP is a research institute with over one hundred research scientists ranging in fields from solar influences, to Earth's and other planetary atmospherics processes, space weather, space plasma and dusty plasma physics. LASP has advanced technical capabilities specializing in designing, building, and operating spacecraft and spacecraft instruments.

<span class="mw-page-title-main">Van Allen radiation belt</span> Zone of energetic charged particles around the planet Earth

Van Allen radiation belt is a zone of energetic charged particles, most of which originate from the solar wind, that are captured by and held around a planet by that planet's magnetosphere. Earth has two such belts, and sometimes others may be temporarily created. The belts are named after James Van Allen, who is often credited with their discovery.

<span class="mw-page-title-main">CubeSat</span> Miniature satellite in 10 cm cube modules

A CubeSat is a class of small satellite with a form factor of 10 cm (3.9 in) cubes. CubeSats have a mass of no more than 2 kg (4.4 lb) per unit, and often use commercial off-the-shelf (COTS) components for their electronics and structure. CubeSats are deployed into orbit from the International Space Station, or launched as secondary payloads on a launch vehicle. As of December 2023, more than 2,300 CubeSats have been launched.

<i>Wind</i> (spacecraft) NASA probe to study solar wind, at L1 since 1995

The Global Geospace Science (GGS) Wind satellite is a NASA science spacecraft designed to study radio waves and plasma that occur in the solar wind and in the Earth's magnetosphere. It was launched on 1 November 1994, at 09:31:00 UTC, from launch pad LC-17B at Cape Canaveral Air Force Station (CCAFS) in Merritt Island, Florida, aboard a McDonnell Douglas Delta II 7925-10 rocket. Wind was designed and manufactured by Martin Marietta Astro Space Division in East Windsor Township, New Jersey. The satellite is a spin-stabilized cylindrical satellite with a diameter of 2.4 m and a height of 1.8 m.

<span class="mw-page-title-main">Solar Dynamics Observatory</span> NASA mission, launched in 2010 to SE-L1

The Solar Dynamics Observatory (SDO) is a NASA mission which has been observing the Sun since 2010. Launched on 11 February 2010, the observatory is part of the Living With a Star (LWS) program.

<span class="mw-page-title-main">THEMIS</span> NASA satellite of the Explorer program

Time History of Events and Macroscale Interactions during Substorms (THEMIS) mission began in February 2007 as a constellation of five NASA satellites to study energy releases from Earth's magnetosphere known as substorms, magnetic phenomena that intensify auroras near Earth's poles. The name of the mission is an acronym alluding to the Titan Themis.

<span class="mw-page-title-main">Van Allen Probes</span> NASA Earth magnetosphere investigator satellites

The Van Allen Probes, formerly known as the Radiation Belt Storm Probes (RBSP), were two robotic spacecraft that were used to study the Van Allen radiation belts that surround Earth. NASA conducted the Van Allen Probes mission as part of the Living With a Star program. Understanding the radiation belt environment and its variability has practical applications in the areas of spacecraft operations, spacecraft system design, mission planning and astronaut safety. The probes were launched on 30 August 2012 and operated for seven years. Both spacecraft were deactivated in 2019 when they ran out of fuel. They are expected to deorbit during the 2030s.

<span class="mw-page-title-main">Solar Anomalous and Magnetospheric Particle Explorer</span> NASA satellite of the Explorer program

The Solar Anomalous and Magnetospheric Particle Explorer was a NASA solar and magnetospheric observatory, and was the first spacecraft in the Small Explorer program. It was launched into low Earth orbit on 3 July 1992, from Vandenberg Air Force Base aboard a Scout G-1 launch vehicle. SAMPEX was an international collaboration between NASA and the Max Planck Institute for Extraterrestrial Physics of Germany. The Solar Anomalous and Magnetospheric Particle Explorer (SAMPEX) is the first of a series of spacecraft that was launched under the Small Explorer (SMEX) program for low cost spacecraft.

<span class="mw-page-title-main">Magnetospheric Multiscale Mission</span> Four NASA robots studying Earths magnetosphere (2015-present)

The Magnetospheric Multiscale (MMS) Mission is a NASA robotic space mission to study the Earth's magnetosphere, using four identical spacecraft flying in a tetrahedral formation. The spacecraft were launched on 13 March 2015 at 02:44 UTC. The mission is designed to gather information about the microphysics of magnetic reconnection, energetic particle acceleration, and turbulence⁠ — processes that occur in many astrophysical plasmas. As of March 2020, the MMS spacecraft has enough fuel to remain operational until 2040.

<span class="mw-page-title-main">Soil Moisture Active Passive</span> NASA earth monitoring satellite that measures global soil moisture

Soil Moisture Active Passive (SMAP) is a NASA environmental monitoring satellite that measures soil moisture across the planet. It is designed to collect a global 'snapshot' of soil moisture every 2 to 3 days. With this frequency, changes from specific storms can be measured while also assessing impacts across seasons of the year. SMAP was launched on 31 January 2015. It was one of the first Earth observation satellites developed by NASA in response to the National Research Council's Decadal Survey.

Electron Losses and Fields Investigation (ELFIN) is a nanosatellite developed by University of California, Los Angeles (UCLA). ELFIN is a 3U+ CubeSat designed to study space weather, specifically, the loss of relativistic electrons in the radiation belts. ELFIN was a participant in the Air Force Research Lab's University Nanosatellite Program and is currently funded by NASA's Low Cost Access to Space program and the National Science Foundation.

<span class="mw-page-title-main">BioSentinel</span> US experimental astrobiology research satellite

BioSentinel is a lowcost CubeSat spacecraft on a astrobiology mission that will use budding yeast to detect, measure, and compare the impact of deep space radiation on DNA repair over long time beyond low Earth orbit.

<span class="mw-page-title-main">Lunar IceCube</span> Nanosatellite launched in 2022

Lunar IceCube is a NASA nanosatellite orbiter mission that was intended to prospect, locate, and estimate amount and composition of water ice deposits on the Moon for future exploitation. It was launched as a secondary payload mission on Artemis 1, the first flight of the Space Launch System (SLS), on 16 November 2022. As of February 2023 it is unknown whether NASA team has contact with satellite or not.

<span class="mw-page-title-main">CubeSat for Solar Particles</span> Nanosatellite

CubeSat for Solar Particles (CuSP) was a low-cost 6U CubeSat to orbit the Sun to study the dynamic particles and magnetic fields. The principal investigator for CuSP is Mihir Desai, at the Southwest Research Institute (SwRI) in San Antonio, Texas. It was launched on the maiden flight of the Space Launch System (SLS), as a secondary payload of the Artemis 1 mission on 16 November 2022.

<span class="mw-page-title-main">Miniature X-ray Solar Spectrometer CubeSat</span>

The Miniature X-ray Solar Spectrometer (MinXSS) CubeSat was the first launched National Aeronautics and Space Administration Science Mission Directorate CubeSat with a science mission. It was designed, built, and operated primarily by students at the University of Colorado Boulder with professional mentorship and involvement from professors, scientists, and engineers in the Aerospace Engineering Sciences department and the Laboratory for Atmospheric and Space Physics, as well as Southwest Research Institute, NASA Goddard Space Flight Center, and the National Center for Atmospheric Research's High Altitude Observatory. The mission principal investigator is Dr. Thomas N. Woods and co-investigators are Dr. Amir Caspi, Dr. Phil Chamberlin, Dr. Andrew Jones, Rick Kohnert, Professor Xinlin Li, Professor Scott Palo, and Dr. Stanley Solomon. The student lead was Dr. James Paul Mason, who has since become a Co-I for the second flight model of MinXSS.

Cislunar Explorers is a pair of spacecraft that will show the viability of water electrolysis propulsion and interplanetary optical navigation to orbit the Moon. Both spacecraft will launch mated together as two L-shaped 3U CubeSats, which fit together as a 6U CubeSat of about 10 cm × 20 cm × 30 cm.

<span class="mw-page-title-main">EQUULEUS</span> Japanese nanosatellite

EQUULEUS is a nanosatellite of the 6U CubeSat format that will measure the distribution of plasma that surrounds the Earth (plasmasphere) to help scientists understand the radiation environment in that region. It will also demonstrate low-thrust trajectory control techniques, such as multiple lunar flybys, within the Earth-Moon region using water steam as propellant. The spacecraft was designed and developed jointly by the Japan Aerospace Exploration Agency (JAXA) and the University of Tokyo.

<span class="mw-page-title-main">Interstellar Mapping and Acceleration Probe</span> Planned NASA heliophysics mission

The Interstellar Mapping and Acceleration Probe(IMAP) is a heliophysics mission that will simultaneously investigate two important and coupled science topics in the heliosphere: the acceleration of energetic particles and interaction of the solar wind with the local interstellar medium. These science topics are coupled because particles accelerated in the inner heliosphere play crucial roles in the outer heliospheric interaction. In 2018, NASA selected a team led by David J. McComas of Princeton University to implement the mission, which is currently planned to launch in late April to late May 2025. IMAP will be a Sun-tracking spin-stabilized satellite in orbit about the Sun–Earth L1 Lagrange point with a science payload of ten instruments. IMAP will also continuously broadcast real-time in-situ data that can be used for space weather prediction.

<span class="mw-page-title-main">Simulation-to-Flight 1</span> Microsatellite

Simulation-to-Flight 1 (STF-1) is a microsatellite built by the Katherine Johnson Independent Verification and Validation Facility (IV&V) in Fairmont, West Virginia with the collaboration of the West Virginia Space Grants Consortium and West Virginia University.

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