Ongoing projects
MIPAS (Michelson Interferometer for Passive Atmospheric Sounding) is operating on ENVISAT since March 2002.
After two years of nearly continuous limb-scanning measurements (from July 2002 to March 2004) at the end of March 2004 the instrument was stopped due to problems with the mirror drive of the interferometer. Operations with reduced maximum path difference, corresponding to both a lower spectral resolution (0.0625 cm-1 instead of 0.025 cm-1 ) and a shorter measurement time (1.8 sec instead of 4.5 sec), were tested for one month in August/September 2004 and then definetely resumed on January 2005. In order to exploit the reduction in measurement time a change in the measurement scenario was also implemented for measurements from January 2005 on. The new scenario adopts a finer vertical limb scanning step in the region of the troposphere and lower stratosphere.
From the first analysis of the new measurements it results that these measurements are characterised by both an improved vertical resolution and a smaller estimated standard deviation.
In general we obtain for all species that in the new operation mode the retrieval errors are smaller than in the old operation mode and the vertical resolution is significantly improved (in troposphere and stratosphere vertical resolution is often smaller than the IFOV).
This result has been obtained despite the improved vertical and horizontal resolution. Indeed, the distribution of the coloured spots along the orbital coordinate shows that also the horizontal sampling has improved.
Latest news on ENVISAT.
MIPAS instrument availability.
MIPAS October 2003 movie
An overview of the multidimensional measurements of MIPAS: global maps (latitude and longitude) of the target species, resolved in altitude and viewed as a function of time.
2003 Ozone hole movie
Here you can download the movie (1.2 MB) of ozone hole and nitric acid behavior at 21 km altitude over Antarctica in the period 13 September - 15 December 2003 (MIPAS near real time data).
MIPAS measurements, re-analysis
Maps of volume mixing ratio (ppmv) of ozone and nitric acid on 30-31 August 2003 (ORM re-analysis of MIPAS measurements).
Ozone (O3) |
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Nitric acid (HNO3) |
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Maps on the left correspond to the orbit indicated in black on the world maps.
Maps on the right correspond to the altitude indicated by the black line on the left maps.
The orbital coordinate is related to the latitude and its value is 0 and 180 at the equator and 90 and 270 respectively at the north pole and at the south pole.
| Dr. Bruno Carli |
Head of Research |
This email address is being protected from spambots. You need JavaScript enabled to view it. Phone: 055 522 6313 |
| Dr. Piera Raspollini |
Scientist |
This email address is being protected from spambots. You need JavaScript enabled to view it. Phone: 055 522 6307 |
| Dr. Simone Ceccherini |
Scientist |
This email address is being protected from spambots. You need JavaScript enabled to view it. Phone: 055 522 6352 |
Past Events:
Meeting #20 of MIPAS Quality Working Group, 29th June -1th July 2009
Draft Agenda
Logistic Information
Meeting #16 of MIPAS Quality Working Group, 22-23 April 2008
Draft Agenda
Logistic Information
Meeting #13 of MIPAS Quality Working Group, 12-14 June 2007
Draft Agenda
Logistic information
Meeting #9 of MIPAS Quality Working Group, 1-2 February 2006
Logistic information
Meeting #7 of MIPAS Quality Working Group, 18-19 April 2005
Agenda
Logistic information
Meeting #2 of MIPAS Quality Working Group, 3-5 December 2003
Agenda
Logistic information
ASSET - SPARC Data Assimilation Workshop, 4-6 June 2003
http://www.ifac.cnr.it/~piera/mipas/
- M. Ridolfi, B. Carli, M. Carlotti, T. von Clarmann, B. M. Dinelli, A. Dudhia, J.-M. Flaud, M. Höpfner, P. E. Morris, P. Raspollini, G. Stiller, and R. J. Wells, "Optimized forward model and retrieval scheme for MIPAS near-real-time data processing", Applied Optics, 39, 1323-1340 (2000).
- P. Raspollini and M. Ridolfi, "Mapping of temperature and Line-of-Sight Errors in Constituent retrievals for MIPAS / ENVISAT Measurements", Atmospheric Environment 34, 5329-5336 (2000).
- B. Carli, B. M. Dinelli, P. Raspollini and M. Ridolfi, "Discrete representation and re-sampling in limb sounding measurements", Applied Optics, 40, 1261-1268 (2001).
- M. Carlotti, B. M. Dinelli, P. Raspollini and M. Ridolfi, "Geo-fit approach to the analysis of limb-scanning satellite measurements", Applied Optics, 40, 1872-1885 (2001).
- S. Ceccherini, B. Carli, E. Pascale, M. Prosperi, P. Raspollini, and B. M. Dinelli, "Comparison of measurements made with two different instruments of the same atmospheric vertical profile", Applied Optics, 42, 6465 - 6473 (2003).
- T. von Clarmann, M. Höpfner, B. Funke, M. López-Puertas, A. Dudhia, V. Jay, F. Schreier, M. Ridolfi, S. Ceccherini, B. J. Kerridge, J. Reburn, R. Siddans and J.-M. Flaud, "Modelling of Atmospheric Mid-Infrared Radiative Transfer: The AMIL2DA Algorithm Intercomparison Experiment", Journal of Quantitative Spectroscopy and Radiative Transfer 78 Issues 3-4, 381-407 (2003)
- T. von Clarmann., S. Ceccherini, A. Doicu., A. Dudhia., B. Funke, U. Grabowski, S. Hilgers, V. Jay, A. Linden., M. Lopez-Puertas., F.-J. Martin-Torres, V. Payne, J. Reburn, M. Ridolfi., F. Schreier, G. Schwarz, R. Siddans, T. Steck, "A blind test retrieval experiment for infrared limb emission spectroscopy", J. Geophys. Res., 108(D23), 4746, doi:10.1029/2003JD003835, 2003.
- B. Carli, D. Alpaslan, M. Carlotti, E. Castelli, S. Ceccherini, B. M. Dinelli, A. Dudhia, J. M. Flaud, M. Hoepfner, V. Jay, L. Magnani, H. Oelhaf, V. Payne, C. Piccolo, M. Prosperi, P. Raspollini, J, Remedios, M. Ridolfi and R. Spang, "First results of MIPAS/ENVISAT with operational level 2 code", Advances in Space Research Vol. 33 Issue 7, 1012-1019 (2004).
- C. Piccolo, B. Carli and S. Ceccherini, "Test of the MIPAS retrieval code with ATMOS measurements", Journal of Atmospheric and Oceanic Technology Vol. 21 No. 10, 1557-1565 (2004)
- S. Ceccherini, "Analytical determination of the regularization parameter in the retrieval of atmospheric vertical profiles", Optics Letters Vol. 30 No. 19, 2554-2556 (2005)
- M. Ridolfi, S. Ceccherini and B. Carli, "Optimal interpolation method for intercomparison of atmospheric measurements", Optics Letters Vol. 31 No. 7, 855-857 (2006)
- F. Mencaraglia, G. Bianchini, A. Boscaleri, B. Carli, S. Ceccherini, P. Raspollini, A. Perrin, and J.-M. Flaud, "Validation of MIPAS satellite measurements of HNO3 using comparison of rotational and vibrational spectroscopy",J. Geophys. Res., 111, D19305, doi:10.1029/2005JD006099 (2006).
- P. Raspollini, C. Belotti , A. Burgess, B. Carli, M. Carlotti, S. Ceccherini, B. M. Dinelli, A. Dudhia, J.-M. Flaud, B. Funke, M. Höpfner, M. Lopez-Puertas, V. Payne, C. Piccolo, J. J. Remedios, M. Ridolfi, R. Spang, "MIPAS level 2 operational analysis", Atmospheric Chemistry and Physics, 6, 5605-5630 (2006).
- S. Ceccherini, C. Belotti, B. Carli, P. Raspollini and M. Ridolfi, "Technical note: regularization performances with the error consistency method in the case of retrieved atmospheric profiles", Atmospheric Chemistry and Physics, 7, 1435-1440 (2007).
- W. A. Lahoz, A. J. Geer, S. Bekki, N. Bormann, S. Ceccherini, H. Elbern, Q. Errera, H. J. Eskes, D. Fonteyn, D. R. Jackson, B. Khattatov, M. Marchand, S. Massart, V.-H. Peuch, S. Rharmili, M. Ridolfi, A. Segers, O. Talagrand, H. E. Thornton, A. F. Vik, and T. von Clarmann, "The Assimilation of Envisat data (ASSET) project", Atmospheric Chemistry and Physics, 7, 1773-1796 (2007).
- S. Ceccherini, C. Belotti, B. Carli and P. Raspollini, "The use of apodization in quantitative spectroscopy", Optics Letters Vol. 32 No. 10, 1329-1331 (2007)
- M. Ridolfi, U. Blum, B. Carli, V. Catoire, S. Ceccherini, H. Claude, C. De Clercq, K. H. Fricke, F. Friedl-Vallon, M. Iarlori, P. Keckhut, B. Kerridge, J.-C. Lambert, Y. J. Meijer, L. Mona, H. Oelhaf, G. Pappalardo, M. Pirre, V. Rizi, C. Robert, D. Swart, T. von Clarmann, A. Waterfall, and G. Wetzel, "Geophysical validation of temperature retrieved by the ESA processor from MIPAS/ENVISAT atmospheric limb-emission measurements", Atmospheric Chemistry and Physics, 7, 4459-4487 (2007).
- S. Ceccherini, U. Cortesi, P.T. Verronen, E. Kyrölä, "Continuity of MIPAS-ENVISAT operational ozone data quality from full- to reduced- spectral-resolution operation mode", Atmospheric Chemistry and Physics, 8, 2201-2212 (2008).
- S. Ceccherini, P. Raspollini and B. Carli, "Optimal use of the information provided by indirect measurements of atmospheric vertical profiles", Optics Express, Vol. 17 No. 7, 4944-4958 (2009).
- P. T. Verronen, S. Ceccherini, U. Cortesi, E. Kyrölä and J. Tamminen, "Statistical comparison of night-time NO2 observations in 2003-2006 from GOMOS and MIPAS instruments", Advances in Space Research, Vol. 43, 1918-1925 (2009), doi:10.1016/j.asr.2009.01.027
This re-analysis provides an extension in the altitude range of the retrieval as well as further atmospheric constituents relative to the near real time ESA processing. However it is for the moment limited to a few measurements. An example is provided for measurements of 30-31 August 2003.
Maps on the left correspond to the orbit indicated in black on the world maps.
Maps on the right correspond to the altitude indicated by the black line on the left maps.
The orbital coordinate is related to the latitude and its value is 0 and 180 at the equator and 90 and 270 respectively at the north pole and at the south pole.
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