Similarity transformation‐based analysis of atmospheric models, data, and inverse remote sensing algorithms

Meier, R. R.; Picone, J. M.; Drob, D. P.; Roble, R. G.

doi:10.1029/2001ja000062

Cited by 13 publications

(22 citation statements)

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“…The data/model ratios from the two techniques were fairly well correlated (0.68 and a relative bias of less than 5% in the 300-500 km altitude range), but there were systematic differences in the height dependence of the density ratios. Picone and Meier (2000) and Meier et al (2001) described a more general inversion method based on similarity transforms; this method is appropriate when the shape of the altitude profile of a measured parameter contains physical information.…”

Section: Ultraviolet Remote Sensingmentioning

confidence: 99%

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Thermospheric mass density: A review

Emmert

2015

Advances in Space Research

205

217

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Section: Ultraviolet Remote Sensingmentioning

confidence: 99%

“…Above ~200 km, molecular diffusion and gravity cause the constituent species to separate according to mass and follow individual hydrostatic profiles (Meier et al, 2001), as illustrated in Fig. 2.…”

Section: Basic Physical Considerationsmentioning

confidence: 99%

Thermospheric mass density: A review

Emmert

2015

Advances in Space Research

205

217

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“…Meier et al [2001] recently analyzed a general circulation model calculation at moderate solar activity and low geomagnetic activity which departs from diffusive equilibrium in the lower and middle thermosphere, unlike MSISE-90. However, the larger problem of solar activity dependence remains to be addressed by using detailed three-dimensional models [Aikin et al, 1993].…”

Section: Solar Ultraviolet Occultation Versus Mass Spectrometrymentioning

confidence: 99%

NRLMSISE‐00 empirical model of the atmosphere: Statistical comparisons and scientific issues

et al. 2002

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[1] The new NRLMSISE-00 empirical atmospheric model extends from the ground to the exobase and is a major upgrade of the MSISE-90 model in the thermosphere. The new model and the associated NRLMSIS database now include the following data: (1) total mass density from satellite accelerometers and from orbit determination (including the Jacchia and Barlier data sets), (2) temperature from incoherent scatter radar covering 1981-1997, and (3) molecular oxygen number density, [O 2 ], from solar ultraviolet occultation aboard the Solar Maximum Mission. A new component, ''anomalous oxygen,'' allows for appreciable O + and hot atomic oxygen contributions to the total mass density at high altitudes and applies primarily to drag estimation above 500 km. Extensive tables compare our entire database to the NRLMSISE-00, MSISE-90, and Jacchia-70 models for different altitude bands and levels of geomagnetic activity. We also explore scientific issues related to the new data sets in the NRLMSIS database. Especially noteworthy is the solar activity dependence of the Jacchia data, with which we study a large O + contribution to the total mass density under the combination of summer, low solar activity, high latitude, and high altitude. Under these conditions, except at very low solar activity, the Jacchia data and the Jacchia-70 model indeed show a significantly higher total mass density than does MSISE-90. However, under the corresponding winter conditions, the MSIS-class models represent a noticeable improvement relative to Jacchia-70 over a wide range of F 10.7 . Considering the two regimes together, NRLMSISE-00 achieves an improvement over both MSISE-90 and Jacchia-70 by incorporating advantages of each.

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“…Sim i lar ity Trans form ap proach of Meier et al (2001). Another way is to ex tend the tomographic al go rithm to in gest mul ti ple occultations and in vert them si mul ta neously with the TIP ra di ance data.…”

Section: Con Clud Ing Re Marksmentioning

confidence: 99%

Tomographic Reconstruction of the Low-Latitude Nighttime Electron Density Using FORMOSAT-3/COMSIC Radio Occultation and UV Photometer Data

Dymond¹,

Budzien²,

Chua³

et al. 2009

Terr. Atmos. Ocean. Sci.

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AB STRACTThe Con stel la tion Ob serv ing Sys tem for Me te o rol ogy, Ion o sphere, and Cli mate (FORMOSAT-3/COS MIC) is a con stel la tion of six microsatellites that was launched into low-Earth or bit on 14 April 2006. Each FORMOSAT-3/COS MIC sat el lite con tains a GPS Occultation Ex per i ment (GOX) GPS re ceiver and a Tiny Ion o spheric Pho tom e ter (TIP), which mea sure the ion o sphere. In pre vi ous pa pers of Dymond and Thomas (2001) and Dymond et al. (2000), an al go rithm for tomographically in vert ing GPS occultation and UV ra di om e ter mea sure ments has been pre sented. We ap ply this al go rithm to the in ver sion of recently acquired FORMOSAT-3/COSMIC data and present the results.Key words: Ion o sphere, To mog ra phy, FORMOSAT-3/COS MIC, Appelton anom aly Ci ta tion: : Tomographic re con struc tion of the low-lat i tude night time elec tron density us ing FORMOSAT-3/COMSIC ra dio occultation and UV pho tom e ter data. Terr. Atmos. Ocean. Sci., 20, 215-226, doi: 10.3319/TAO.2008. 01.15.01(F3C) IN TRO DUC TIONThe use of to tal elec tron con tent mea sure ments ac quired dur ing occultation of the Global Po si tion ing Sat el lites (GPS) by a re ceiv ing plat form in low Earth or bit has re cently been dem on strated as a vi a ble tech nique for de ter min ing the ion ospheric elec tron den sity (Hajj et al. 1994). The cor ner stone of the tech nique is use of the Abel in ver sion to con vert the to tal elec tron con tent mea sure ments made by the GPS receiver into elec tron den sity pro files. This tech nique as sumes that the ion o sphere is spher i cally sym met ric with no hor izon tal den sity gra di ents. The Abel tech nique works well under cer tain view ing con di tions but its ac cu racy is gen er ally lim ited by the spher i cal sym me try as sump tion. When there are sub stan tial ion o spheric den sity gra di ents pres ent, the Abel in ver sion tech nique yields poor re sults due to an inability to han dle gra di ents (Hajj et al. 1994). As GPS occultations oc cur spo rad i cally around the globe, it is dif fi cult to use them in a sys tem atic way to gather in for ma tion about the global struc ture of the ion o sphere. Thus, al ter na tive techniques must be used to in fer the gra di ents and to ac count for them in the in ver sion pro cess.Sev eral tech niques have been used to in fer ion o spheric gra di ents. On the Formosa Sat el lite -3 or Con stel la tion Observ ing Sys tem for Me te o rol ogy, Ion o sphere, and Climate (FORMOSAT-3/COS MIC), GPS occultation mea surements will be com ple mented by ul tra vi o let ra dio met ric measure ments, mea sure ments of the to tal elec tron con tent between the sat el lites and ground us ing com put er ized ion ospheric to mog ra phy re ceiv ers, and ground-based GPS to tal elec tron con tent mea sure ments. The use of ul tra vi o let (UV) ra di om e ters pro vides an ac cu rate mea sure ment of the gra dients on a global ba sis and does not rely on ground-based receivers.Nat u rally oc cur ring ul tra vi o let and vis i ble emi...

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Similarity transformation‐based analysis of atmospheric models, data, and inverse remote sensing algorithms

Cited by 13 publications

References 23 publications

Thermospheric mass density: A review

Thermospheric mass density: A review

NRLMSISE‐00 empirical model of the atmosphere: Statistical comparisons and scientific issues

Tomographic Reconstruction of the Low-Latitude Nighttime Electron Density Using FORMOSAT-3/COMSIC Radio Occultation and UV Photometer Data

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