Abstract
The Ionospheric Connection Explorer, or ICON, is a new NASA Explorer mission that will explore the boundary between Earth and space to understand the physical connection between our world and our space environment. This connection is made in the ionosphere, which has long been known to exhibit variability associated with the sun and solar wind. However, it has been recognized in the 21st century that equally significant changes in ionospheric conditions are apparently associated with energy and momentum propagating upward from our own atmosphere. ICON’s goal is to weigh the competing impacts of these two drivers as they influence our space environment. Here we describe the specific science objectives that address this goal, as well as the means by which they will be achieved. The instruments selected, the overall performance requirements of the science payload and the operational requirements are also described. ICON’s development began in 2013 and the mission is on track for launch in 2018. ICON is developed and managed by the Space Sciences Laboratory at the University of California, Berkeley, with key contributions from several partner institutions.
Similar content being viewed by others
References
P. Alken, A quiet time empirical model of equatorial vertical plasma drift in the Peruvian sector based on 150 km echoes. J. Geophys. Res. 114, 02308 (2009). doi:10.1029/2008JA013751
M. Blanc, A.D. Richmond, The ionospheric disturbance dynamo. J. Geophys. Res. 85, 1669–1688 (1980)
S.W. Bougher, T.E. Cravens, J. Grebowsky, J. Luhmann, The aeronomy of Mars: characterization by MAVEN of the upper atmosphere reservoir that regulates volatile escape. Space Sci. Rev. 195, 423–456 (2015). doi:10.1007/s11214-014-0053-7
S. Bowyer, J. Edelstein, M. Lampton, Very high sensitivity extreme ultraviolet spectrometer for diffuse radiation. Astrophys. J. 485(2), 523 (1997)
J. Burt, B. Smith, The deep space climate observatory: the DSCOVR mission, in Aerospace Conference, 2012 IEEE (IEEE Publications, New York, New York, 2012), pp. 1–13
G.S. Bust, T.W. Garner, T.L. Gaussiran, Ionospheric data assimilation three-dimensional (IDA3D): a global, multisensor, electron density specification algorithm. J. Geophys. Res. 109, 11312 (2004). doi:10.1029/2003JA010234
G.S. Bust, S. Datta-Barua, Scientific investigations using IDA4D and EMPIRE, in Modeling the Ionosphere–Thermosphere System, ed. by J. Huba, R. Schunk, G. Khazanov (Wiley, Chichester, 2014). doi:10.1002/9781118704417.ch23
S. Chapman, The solar and lunar diurnal variation of the Earth’s magnetism. Philos. Trans. R. Soc. 218(A), 1–118 (1919)
S. Chapman, R. Lindzen, in Atmospheric Tides. Thermal and Gravitational (Reidel, Dordrecht, 1970)
A.B. Christensen, L.J. Paxton, S. Avery, J. Craven, G. Crowley, D.C. Humm, H. Kil, R.R. Meier, C.-I. Meng, D. Morrison, B.S. Ogorzalek, P. Straus, D.J. Strickland, R.M. Swenson, R.L. Walterscheid, B. Wolven, Y. Zhang, Initial observations with the global ultraviolet imager (GUVI) in the NASA TIMED satellite mission. J. Geophys. Res. 108 (2003). doi:10.1029/2003JA009918, pp. 16
G.D. Earle, M.C. Kelley, Spectral studies of the sources of ionospheric electric fields. J. Geophys. Res. 92, 213–224 (1987). doi:10.1029/JA092iA01p00213
S.L. England, A review of the effects of non-migrating atmospheric tides on the Earth’s low-latitude ionosphere. Space Sci. Rev. 168, 211–236 (2012). doi:10.1007/s11214-011-9842-4
S.L. England, T.J. Immel, E. Sagawa, S.B. Henderson, M.E. Hagan, S.B. Mende, H.U. Frey, C.M. Swenson, L.J. Paxton, Effect of atmospheric tides on the morphology of the quiet time, postsunset equatorial ionospheric anomaly. J. Geophys. Res. 111, 10–19 (2006a). doi:10.1029/2006JA011795
S.L. England, S. Maus, T.J. Immel, S.B. Mende, Longitudinal variation of the E-region electric fields caused by atmospheric tides. Geophys. Res. Lett. 33, 21105 (2006b). doi:10.1029/2006GL027465
S.L. England, T.J. Immel, J.D. Huba, Modeling the longitudinal variation in the post-sunset far-ultraviolet OI airglow using the SAMI2 model. J. Geophys. Res. 113, 01309 (2008). doi:10.1029/2007JA012536
S.L. England, X. Zhang, T.J. Immel, J.M. Forbes, R. DeMajistre, The effect of non-migrating tides on the morphology of the equatorial ionospheric anomaly: seasonal variability. Earth Planets Space 61, 493–503 (2009). doi:10.1186/BF03353166
S.L. England, T.J. Immel, J.D. Huba, M.E. Hagan, A. Maute, R. DeMajistre, Modeling of multiple effects of atmospheric tides on the ionosphere: an examination of possible coupling mechanisms responsible for the longitudinal structure of the equatorial ionosphere. J. Geophys. Res. 115, 05308 (2010). doi:10.1029/2009JA014894
C.R. Englert, J.M. Harlander, C.M. Brown, K.D. Marr, I.J. Miller, J.E. Stump, J. Hancock, J.Q. Peterson, J. Kumler, W.H. Morrow, T.A. Mooney, S. Ellis, S.B. Mende, S.E. Harris, M.H. Stevens, J.J. Makela, B.J. Harding, T.J. Immel, Michelson interferometer for global high-resolution thermospheric imaging (MIGHTI): instrument design and calibration. Space Sci. Rev. (2017). doi:10.1007/s11214-017-0358-4
J.A. Fejer, Semidiurnal currents and electron drifts in the ionosphere. J. Atmos. Terr. Phys. 4, 184–203 (1953). doi:10.1016/0021-9169(53)90054-3
J.M. Forbes, The upper mesosphere and lower thermosphere: a review of experiment and theory, in Tidal and Planetary Waves, ed. by R.M. Johnson, T.L. Killeen Geophys. Monogr. Ser., vol. 87 (American Geophys. Union Press, Washington, D.C., 1995)
J.M. Forbes, M.E. Hagan, Thermospheric extensions of the classical expansion functions for semidiurnal tides. J. Geophys. Res. 87, 5253–5259 (1982). doi:10.1029/JA087iA07p05253
J.M. Forbes, X. Zhang, M.E. Hagan, S.L. England, G. Liu, F. Gasperini, On the specification of upward-propagating tides for ICON science investigations. Space Sci. Rev. (2017), this issue. doi:10.1007/s11214-017-0401-5
T.J. Fuller-Rowell, D. Rees, H. Rishbeth, A.G. Burns, T.L. Killeen, R.G. Roble, Modelling of composition changes during F-region storms—a reassessment. J. Atmos. Terr. Phys. 53, 541–550 (1991)
T.J. Fuller-Rowell, G.H. Millward, A.D. Richmond, M.V. Codrescu, Storm-time changes in the upper atmosphere at low latitudes. J. Atmos. Sol.-Terr. Phys. 64, 1383–1391 (2002)
L.P. Goncharenko, J.L. Chau, H.-L. Liu, A.J. Coster, Unexpected connections between the stratosphere and ionosphere. Geophys. Res. Lett. 37, 10101 (2010). doi:10.1029/2010GL043125
M.E. Hagan, J.M. Forbes, Migrating and nonmigrating diurnal tides in the middle and upper atmosphere excited by tropospheric latent heat release. J. Geophys. Res., Atmos. 107, 6-1 (2002). doi:10.1029/2001JD001236
M.E. Hagan, A. Maute, R.G. Roble, A.D. Richmond, T.J. Immel, S.L. England, The effects of deep tropical clouds on the Earth’s ionosphere. Geophys. Res. Lett. 34, 20109 (2007). doi:10.1029/2007GL030142
L.A. Hall, H.E. Hinteregger, Solar radiation in the extreme ultraviolet and its variation with solar rotation. J. Geophys. Res. 75, 6959–6965 (1970). doi:10.1029/JA075i034p06959
B.J. Harding, J.J. Makela, C.R. Englert, K.D. Marr, J.M. Harlander, S.L. England, T.J. Immel, The MIGHTI wind retrieval algorithm: Description and verification. Space Sci. Rev. 212(1–2), 585–600 (2017), this issue. doi:10.1007/s11214-017-0359-3
J.M. Harlander, C.R. Englert, C.M. Brown, K.D. Marr, I.J. Miller, V. Zastera, B.W. Bach, S.B. Mende, Michelson interferometer for global high-resolution thermospheric imaging (MIGHTI): monolithic interferometer design and test. Space Sci. Rev. (2017). doi:10.1007/s11214-017-0374-4
W.A. Hartman, R.A. Heelis, Longitudinal variations in the equatorial vertical drift in the topside ionosphere. J. Geophys. Res. 112 (2007). doi:10.1029/2006JA011773
R.A. Heelis, Electrodynamics in the low and middle latitude ionosphere: a tutorial. J. Atmos. Terr. Phys. 66, 825–838 (2004). doi:10.1016/j.jastp.2004.01.034
R.A. Heelis, R. Stoneback, G.D. Earle, R.A. Haaser, M.A. Abdu, Medium-scale equatorial plasma irregularities observed by coupled ion-neutral dynamics investigation sensors aboard the communication navigation outage forecast system in a prolonged solar minimum. J. Geophys. Res. 115, 10321 (2010). doi:10.1029/2010JA015596
R.A. Heelis, R.A. Stoneback, M.D. Perdue, M.P. Depew, Z.A. Morgan, M.D. Mankey, C.R. Lippincott, L.L. Harmon, B.J. Holt, Ion velocity measurements for the Ionospheric Connections Explorer. Space Sci. Rev. (2017), this issue. doi:10.1007/s11214-017-0383-3
C.O. Hines, Internal atmospheric gravity waves at ionospheric heights. Can. J. Phys. 38, 1441–1481 (1960)
C.O. Hines, The upper atmosphere in motion. Q. J. R. Meteorol. Soc. 89, 1–42 (1963). doi:10.1002/qj.49708937902
C.O. Hines, Diurnal tide in the upper atmosphere. J. Geophys. Res. 71, 1453–1459 (1966). doi:10.1029/JZ071i005p01453
C.-S. Huang, F.J. Rich, W.J. Burke, Storm time electric fields in the equatorial ionosphere observed near the dusk meridian. J. Geophys. Res. 115, 08313 (2010). doi:10.1029/2009JA015150
J.D. Huba, G. Joyce, S. Sazykin, R. Wolf, R. Spiro, Simulation study of penetration electric field effects on the low- to mid-latitude ionosphere. Geophys. Res. Lett. 32 (2005). doi:10.1029/2005GL024162
J.D. Huba, A. Maute, G. Crowley, SAMI3-ICON: model of the ionosphere/plasmasphere system. Space Sci. Rev. (2017), this issue. doi:10.1007/s11214-017-0415-z
T.J. Immel, G. Crowley, J.D. Craven, R.G. Roble, Dayside enhancements of thermospheric O/N2 following magnetic storm onset. J. Geophys. Res. 106, 15471–15488 (2001)
T.J. Immel, S.B. Mende, H.U. Frey, N. Østgaard, G.R. Gladstone, Effect of the 14 July 2000 solar flare on Earth’s FUV emissions. J. Geophys. Res. 180, 1155 (2003). doi:10.1029/2001JA009060
T.J. Immel, E. Sagawa, S.L. England, S.B. Henderson, M.E. Hagan, S.B. Mende, H.U. Frey, C.M. Swenson, L.J. Paxton, The control of equatorial ionospheric morphology by atmospheric tides. Geophys. Res. Lett. 33, 15108 (2006). doi:10.1029/2006GL026161
T.J. Immel, S.L. England, X. Zhang, J.M. Forbes, R. DeMajistre, Upward propagating tidal effects across the E- and F-regions of the ionosphere. Earth Planets Space 61, 505–512 (2009)
B.M. Jakosky, R.P. Lin, J.M. Grebowsky, J.G. Luhmann, D.F. Mitchell, G. Beutelschies, T. Priser, M. Acuna, L. Andersson, D. Baird, D. Baker, R. Bartlett, M. Benna, S. Bougher, D. Brain, D. Carson, S. Cauffman, P. Chamberlin, J.-Y. Chaufray, O. Cheatom, J. Clarke, J. Connerney, T. Cravens, D. Curtis, G. Delory, S. Demcak, A. DeWolfe, F. Eparvier, R. Ergun, A. Eriksson, J. Espley, X. Fang, D. Folta, J. Fox, C. Gomez-Rosa, S. Habenicht, J. Halekas, G. Holsclaw, M. Houghton, R. Howard, M. Jarosz, N. Jedrich, M. Johnson, W. Kasprzak, M. Kelley, T. King, M. Lankton, D. Larson, F. Leblanc, F. Lefevre, R. Lillis, P. Mahaffy, C. Mazelle, W. McClintock, J. McFadden, D.L. Mitchell, F. Montmessin, J. Morrissey, W. Peterson, W. Possel, J.-A. Sauvaud, N. Schneider, W. Sidney, S. Sparacino, A.I.F. Stewart, R. Tolson, D. Toublanc, C. Waters, T. Woods, R. Yelle, R. Zurek, The Mars Atmosphere and Volatile Evolution (MAVEN) mission. Space Sci. Rev. 195, 3–48 (2015). doi:10.1007/s11214-015-0139-x
F. Kamalabadi, J. Qin, B. Harding, D. Iliou, J. Makela, R.R. Meier, S.L. England, H.U. Frey, S.B. Mende, T.J. Immel, Inferring nighttime ionospheric parameters with the Far Ultraviolet Imager onboard the Ionospheric Connection Explorer. Space Sci. Rev. (2017), this issue
S. Kato, Horizontal wind systems in the ionospheric E region deduced from the dynamo theory of geomagnetic Sq variation, Part II. J. Geomagn. Geoelectr. 8, 24–37 (1956)
S. Kato, Diurnal atmospheric oscillation, 1, eigenvalues and Hough functions. J. Geophys. Res. 71, 3201–3209 (1966)
M.C. Kelley, The Earth’s Ionosphere, Plasma Physics and Electrodynamics, 1st edn. (Academic Press, Inc., San Diego, 1989)
M.C. Kelley, R.R. Ilma, M. Nicolls, P. Erickson, L. Goncharenko, J.L. Chau, N. Aponte, J.U. Kozyra, Spectacular low- and mid-latitude electrical fields and neutral winds during a superstorm. J. Atmos. Sol.-Terr. Phys. 72, 285–291 (2010). doi:10.1016/j.jastp.2008.12.006
H. Kil, S.-J. Oh, M.C. Kelley, L.J. Paxton, S.L. England, E. Talaat, K.-W. Min, S.-Y. Su, Longitudinal structure of the vertical E × B drift and ion density seen from ROCSAT-1. Geophys. Res. Lett. 34, 14110 (2007). doi:10.1029/2007GL030018
M.O. Lampton, O.H.W. Siegmund, R. Raffanti, Delay line anodes for microchannel plate spectrometers. Rev. Sci. Instrum. 58, 2298–2305 (1987)
M.F. Larsen, Winds and shears in the mesosphere and lower thermosphere: results from four decades of chemical release wind measurements. J. Geophys. Res. 107, 1215 (2002). doi:10.1029/2001JA000218
C.H. Lin, W. Wang, M.E. Hagan, C.C. Hsiao, T.J. Immel, M.L. Hsu, J.Y. Liu, L.J. Paxton, T.W. Fang, C.H. Liu, Plausible effect of atmospheric tides on the equatorial ionosphere observed by the FORMOSAT-3/COSMIC: three-dimensional electron density structures. Geophys. Res. Lett. 34, 11112 (2007). doi:10.1029/2007GL029265
H. Lühr, K. Häusler, C. Stolle, Longitudinal variation of F region electron density and thermospheric zonal wind caused by atmospheric tides. Geophys. Res. Lett. 34, 16102 (2007). doi:10.1029/2007GL030639
N. Maruyama, A.D. Richmond, T.J. Fuller-Rowell, M.V. Codrescu, S. Sazykin, F.R. Tof- foletto, R.W. Spiro, G.H. Millward, Interaction between direct penetration and disturbance dynamo electric fields in the storm-time equatorial ionosphere. Geophys. Res. Lett. 32, 17105 (2005). doi:10.1029/2005GL023763
N. Maruyama, S. Sazykin, R.W. Spiro, D. Anderson, A. Anghel, R.A. Wolf, F.R. Toffoletto, T.J. Fuller-Rowell, M.V. Codrescu, A.D. Richmond, G.H. Millward, Modeling storm-time electrodynamics of the low-latitude ionosphere thermosphere system: can long lasting disturbance electric fields be accounted for? J. Atmos. Sol.-Terr. Phys. 69, 1182–1199 (2007). doi:10.1016/j.jastp.2006.08.020
A. Maute, Thermosphere–ionosphere-electrodynamics general circulation model for the Ionospheric Connection Explorer: TIEGCM-ICON. Space Sci. Rev. (2017), this issue. doi:10.1007/s11214-017-0330-3
H.G. Mayr, P. Bauer, H.C. Brinton, L.H. Brace, W.E. Potter, Diurnal and seasonal variations in atomic and molecular oxygen inferred from Atmosphere Explorer-C. Geophys. Res. Lett. 3, 77–80 (1976)
S.B. Mende, Observing the magnetosphere through global auroral imaging: 2. Observing techniques. J. Geophys. Res. 121, 10 (2016). doi:10.1002/2016JA022607
S.B. Mende, H. Heetderks, H.U. Frey, M. Stock, M. Lampton, S.P. Geller, R. Abiad, O.H.W. Siegmund, S. Habraken, E. Renotte, C. Jamar, P. Rochus, J.-C. Gérard, R. Sigler, H. Lauche, Far ultraviolet imaging from the IMAGE spacecraft. 3. Spectral imaging of Lyman-\(\alpha\) and OI 135.6 nm. Space Sci. Rev. 91, 287–318 (2000)
S.B. Mende, H.U. Frey, K. Rider, C. Chou, S.E. Harris, O.H.W. Siegmund, S.L. England, C.W. Wilkins, W.W. Craig, P. Turin, N. Darling, T.J. Immel, J. Loicq, P. Blain, E. Syrstadt, B. Thompson, R. Burt, J. Champagne, P. Sevilla, S. Ellis, The Far Ultra-Violet imager on the ICON mission. Space Sci. Rev. (2017), this issue. doi:10.1007/s11214-017-0386-0
C.G. Park, D.L. Carpenter, D.B. Wiggin, Electron density in the plasmasphere – Whistler data on solar cycle, annual, and diurnal variations. J. Geophys. Res. 83, 3137–3144 (1978). doi:10.1029/JA083iA07p03137
N.M. Pedatella, J. Oberheide, E.K. Sutton, H.-L. Liu, J.L. Anderson, K. Raeder, Short-term nonmigrating tide variability in the mesosphere, thermosphere, and ionosphere. J. Geophys. Res. 121, 3621–3633 (2016). doi:10.1002/2016JA022528
A.D. Richmond, Modeling equatorial ionospheric electric fields. J. Atmos. Terr. Phys. 57, 1103–1115 (1995). doi:10.1016/0021-9169(94)00126-9
A.D. Richmond, E.C. Ridley, R.G. Roble, A thermosphere/ionosphere general circulation model with coupled electrodynamics. Geophys. Res. Lett. 19, 601–604 (1992)
K. Rider, T.J. Immel, E.R. Taylor, W.W. Craig, ICON: where Earth’s weather meets space weather, in 2015 IEEE Aerospace Conference (IEEE, New York, 2015), pp. 1–10. doi:10.1109/AERO.2015.7119120
H. Rishbeth, Thermospheric winds and the F-region, a review. J. Atmos. Terr. Phys. 34, 1–47 (1972)
H. Rishbeth, T.J. Fuller-Rowell, D. Rees, Diffusive equilibrium and vertical motion in the thermosphere during a severe magnetic storm: a computational study. Planet. Space Sci. 35, 1157–1165 (1987). doi:10.1016/0032-0633(87)90022-5
R.G. Roble, G.G. Shepherd, An analysis of wind imaging interferometer observations of O(1S) equatorial emission rates using the thermosphere–ionosphere–mesosphere-electrodynamics general circulation model. J. Geophys. Res. 102, 2467–2474 (1997)
R.G. Roble, E.C. Ridley, A.D. Richmond, R.E. Dickinson, A coupled thermo- sphere/ionosphere general circulation model. Geophys. Res. Lett. 15, 1325–1328 (1988)
E. Sagawa, T.J. Immel, H.U. Frey, S.B. Mende, Longitudinal structure of the equatorial anomaly in the nighttime ionosphere observed by IMAGE/FUV. J. Geophys. Res. 110, 11302 (2005)
R.W. Schunk, A.F. Nagy, Electron temperature in the f region of the ionosphere: theory and observation. Rev. Geophys. 16, 355–399 (1978)
M.M. Sirk, E.J. Korpela, Y. Ishikawa, J. Edelstein, E.H. Wishnow, C. Smith, J. McCauley, J.B. McPhate, J. Curtis, T. Curtis, S.R. Gibson, S. Jelinsky, J.A. Lynn, M. Marckwordt, N. Miller, M. Raffanti, W. Van Shourt, A.W. Stephan, T.J. Immel, Design and performance of the ICON EUV spectrograph. Space Sci. Rev. (2017), this issue. doi:10.1007/s11214-017-0384-2
T.G. Slanger, G. Black, Electronic-to-vibrational energy transfer efficiency in the O(1D)-N2 and O(1D)-CO systems. J. Chem. Phys. 60, 468–477 (1974). doi:10.1063/1.1681064
T.G. Slanger, G. Black, O/1S/ quenching by O/3P/. J. Chem. Phys. 64, 3763–3766 (1976). doi:10.1063/1.432691
J.J. Sojka, J. Jensen, M. David, R.W. Schunk, T. Woods, F. Eparvier, Modeling the ionospheric E and F1 regions: using SDO-EVE observations as the solar irradiance driver. J. Geophys. Res. 118, 5379–5391 (2013). doi:10.1002/jgra.50480
A.W. Stephan, E.J. Korpela, M.M. Sirk, S.L. England, T.J. Immel, Daytime ionosphere retrieval algorithm for the Ionospheric Connection Explorer (ICON). Space Sci. Rev. (2017a), this issue. doi:10.1007/s11214-017-0385-1
A.W. Stephan, R.R. Meier, S.L. England, H.U. Frey, S.B. Mende, T.J. Immel, Daytime O/N2 retrieval algorithm for the Ionospheric Connection Explorer (ICON). Space Sci. Rev. (2017b), this issue
M.H. Stevens, C.R. Englert, J.M. Harlander, S.L. England, K.D. Marr, J.M. Harlander, C.M. Brown, T.J. Immel, Retrieval of lower thermospheric temperatures from O2 A band emission: The MIGHTI experiment on ICON. Space Sci. Rev. (2017), this issue. doi:10.1007/s11214-017-0434-9
E.R. Talaat, R.S. Lieberman, Direct observations of nonmigrating diurnal tides in the equatorial thermosphere. Geophys. Res. Lett. 37, 04803 (2010). doi:10.1029/2009GL041845
F. Toffoletto, S. Sazykin, R. Spiro, R. Wolf, Inner magnetospheric modeling with the Rice Convection Model. Space Sci. Rev. 107, 175–196 (2003). doi:10.1023/A:1025532008047
M.R. Torr, D.G. Torr, R.A. Ong, H.E. Hinteregger, Ionization frequencies for major thermospheric constituents as a function of Solar Cycle 21. Geophys. Res. Lett. 6, 771–774 (1979). doi:10.1029/GL006i010p00771
B. Tsurutani, A. Mannucci, B. Iijima, M.A. Abdu, J.H.A. Sobral, W. Gonzalez, F. Guarnieri, T. Tsuda, A. Saito, K. Yumoto, B. Fejer, T.J. Fuller-Rowell, J. Kozyra, J.C. Foster, A. Coster, V.M. Vasyliunas, Global dayside ionospheric uplift and enhancement associated with interplanetary electric fields. J. Geophys. Res. 109(A18), 8302 (2004). doi:10.1029/2003JA010342
E.H. Vestine, Winds in the upper atmosphere deduced from the dynamo theory of geomagnetic disturbance. J. Geophys. Res. 59(1), 93–128 (1954)
H. Volland, H.G. Mayr, Theoretical aspects of tidal and planetary wave propagation at thermospheric heights. Rev. Geophys. Space Phys. 15, 203–226 (1977). doi:10.1029/RG015i002p00203
C.W. Wilkins, S.B. Mende, H.U. Frey, Time-delay integration imaging with ICON’s Far-Ultraviolet spectrograph. Space Sci. Rev. (2017), this issue
R.F. Woodman, R.G. Rastogi, C. Calderon, Solar cycle effects on the electric fields in the equatorial ionosphere. J. Geophys. Res. 82, 5257–5261 (1977). doi:10.1029/JA082i032p05257
Y. Zhang, S. England, L.J. Paxton, Thermospheric composition variations due to nonmigrating tides and their effect on ionosphere. Geophys. Res. Lett. 37, 17103 (2010). doi:10.1029/2010GL044313
Acknowledgements
ICON is supported by NASA’s Explorers Program through contracts NNG12FA45C and NNG12FA42I. The authors wish to acknowledge the key contributions of Bill Donakowski (Payload Mechanical Engineer) and Bill Gibson (NASA Standing Review Board) who passed on before ICON was delivered. The discoveries of this mission will stand as a testament to their disciplined expertise and commitment to space science.
Author information
Authors and Affiliations
Corresponding author
Additional information
The Ionospheric Connection Explorer (ICON) mission
Edited by Doug Rowland and Thomas J. Immel
Rights and permissions
About this article
Cite this article
Immel, T.J., England, S.L., Mende, S.B. et al. The Ionospheric Connection Explorer Mission: Mission Goals and Design. Space Sci Rev 214, 13 (2018). https://doi.org/10.1007/s11214-017-0449-2
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s11214-017-0449-2