Abstract
The Extreme ultraviolet SpectroPhotometer (ESP) is one of five channels of the Extreme ultraviolet Variability Experiment (EVE) onboard the NASA Solar Dynamics Observatory (SDO). The ESP channel design is based on a highly stable diffraction transmission grating and is an advanced version of the Solar Extreme ultraviolet Monitor (SEM), which has been successfully observing solar irradiance onboard the Solar and Heliospheric Observatory (SOHO) since December 1995. ESP is designed to measure solar Extreme UltraViolet (EUV) irradiance in four first-order bands of the diffraction grating centered around 19 nm, 25 nm, 30 nm, and 36 nm, and in a soft X-ray band from 0.1 to 7.0 nm in the zeroth-order of the grating. Each band’s detector system converts the photo-current into a count rate (frequency). The count rates are integrated over 0.25-second increments and transmitted to the EVE Science and Operations Center for data processing. An algorithm for converting the measured count rates into solar irradiance and the ESP calibration parameters are described. The ESP pre-flight calibration was performed at the Synchrotron Ultraviolet Radiation Facility of the National Institute of Standards and Technology. Calibration parameters were used to calculate absolute solar irradiance from the sounding-rocket flight measurements on 14 April 2008. These irradiances for the ESP bands closely match the irradiance determined for two other EUV channels flown simultaneously: EVE’s Multiple EUV Grating Spectrograph (MEGS) and SOHO’s Charge, Element and Isotope Analysis System/Solar EUV Monitor (CELIAS/SEM).
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Bowman, B.R., Tobiska, W.K., Marcos, F.A., Valladares, C.: 2008, The JB2006 empirical thermospheric density model. J. Atmos. Solar-Terr. Phys. 70, 774.
Didkovsky, L.V., Judge, D.L., Jones, A.R., Wieman, S., Harmon, M., Tobiska, W.K.: 2007a, SEP temporal fluctuations related to extreme solar flare events detected by SOHO/CELIAS/SEM, http://www-rcf.usc.edu/~leonid/papers/AIAA-2007-496-973.pdf.
Didkovsky, L.V., Judge, D.L., Wieman, S., Harmon, M., Woods, T., Jones, A., Chamberlin, P., Woodraska, D., Eparvier, F., McMullin, D., Furst, M., Vest, R.: 2007b, SDO EVE ESP radiometric calibration and results. In: SPIE 6689, San Diego, 6689OP1.
Didkovsky, L.V., Judge, D.L., Wieman, S., McMullin, D.: 2009, Minima of solar cycles 22/23 and 23/24 as seen in SOHO/CELIAS/SEM. In: Cranmer, S., Hoeksema, T., Kohl, J. (eds.) SOHO-23: Understanding a Peculiar Solar Minimum, ASP Conf. Ser., submitted.
Furst, M.L., Graves, R.M., Madden, R.P.: 1993, Synchrotron ultraviolet radiation facility (SURF II) radiometric instrumentation calibration facility. Opt. Eng. 32, 2930.
Hedin, A.E.: 1987, MSIS-86 thermospheric model. J. Geophys. Res. 92, 4649.
Henke, B.L., Gullikson, E.M., Davis, J.C.: 1993, X-ray interactions: photoabsorption, scattering, transmission, and reflection at E=50 – 30 000 eV, Z=1 – 92. At. Data Nucl. Data Tables 54(2), 181.
Hovestadt, D., Hilchenbach, M., Bürgi, A., Klecker, B., Laeverenz, P., Scholer, M., Grünwaldt, H., Axford, W.I., Livi, S., Marsch, E., Wilken, B., Winterhoff, H.P., Ipavich, F.M., Bedini, P., Coplan, M.A., Galvin, A.B., Gloeckler, G., Bochsler, P., Balsiger, H., Fischer, J., Geiss, J., Kallenbach, R., Wurz, P., Reiche, K.-U., Gliem, F., Judge, D.L., Ogawa, H.S., Hsieh, K.C., Möbius, E., Lee, M.A., Managadze, G.G., Verigin, M.I., Neugebauer, M.: 1995, CELIAS – charge, element and isotope analysis system for SOHO. Solar Phys. 162, 441.
Judge, D.L., McMullin, D.R., Ogawa, H.S., Hovestadt, D., Klecker, B., Hilchenbach, M., Möbius, E., Canfield, L.R., Vest, R.E., Watts, R., Tarrio, C., Kuehne, M., Wurz, P.: 1998, First solar EUV irradiances from SOHO by the CELIAS/SEM. Solar Phys. 177, 161.
Ogawa, H.S., Canfield, L.R., McMullin, D., Judge, D.L.: 1990, Sounding rocket measurement of the absolute solar EUV flux utilizing a silicon photodiode. J. Geophys. Res. 95, 4291.
Picone, J.M., Hedin, A.E., Drob, D.P., Aikin, A.C.: 2003, NRL-MSISE-00 empirical model of the atmosphere: Statistical comparisons and scientific issues. J. Geophys. Res., doi:10.1029/2002JA009430.
Schattenburg, M.L., Anderson, E.H.: 1990, X-ray/VUV transmission gratings for astrophysical and laboratory applications. Phys Scr. 41, 13.
Scime, E.E., Anderson, E.H., McComas, D.J., Schattenburg, M.L.: 1995, Extreme-ultraviolet polarization and filtering with gold transmission gratings. Appl. Opt. 34(4), 648.
Tobiska, W.K.: 2007, SOLAR2000 v2.30 and SOLARFLARE v1.01: New capabilities for space system operations, http://www.spacewx.com/pdf/SET_AIAA_2007.pdf.
Tobiska, W.K., Bouwer, S.D., Bowman, B.R.: 2006, The development of new solar indices for use in thermospheric density modeling, http://sol.spacenvironment.net/~JB2008/pubs/SET_AIAA_2006_revD.pdf.
Tsurutani, B.T., Judge, D.L., Guarnieri, F.L., Gangopadhyay, P., Jones, A.R., Nuttall, J., Zambon, G.A., Didkovsky, L., Mannucci, A.J., Iijima, B., et al.: 2005, The October 28, 2003 extreme EUV solar flare and resultant extreme ionospheric effects: Comparison to other Halloween events and the Bastille Day event. Geophys. Res. Lett. 32, L03S09.
Woods, T.N., Bailey, S., Eparvier, F.G.: 1998, TIMED solar EUV experiment. SPIE 3442, 180.
Woods, T.N., Ogawa, H., Tobiska, K., Farnik, F.: 1998, SOLERS-22 WG-4 and WG-5 report for the 1996 SOLERS-22 workshop. In: Pap, J.M., Fröhlich, C., Ulrich, R.K. (eds.) Solar Electromagnetic Radiation Study for Solar Cycle 22, Kluwer, Dordrecht, 511.
Woods, T.N., Chamberlin, P., Eparvier, F.G., Hock, R., Jones, A., Woodraska, D., Judge, D., Didkosky, L., Lean, J., Mariska, J., et al.: 2009, Extreme ultraviolet variability experiment (EVE) on the solar dynamics observatory (SDO): Overview of science objectives, instrument design, data products, and model developments. Solar Phys., accepted.
Author information
Authors and Affiliations
Corresponding author
Additional information
The Solar Dynamics Observatory
Guest Editors: W. Dean Pesnell, Phillip C. Chamberlin, and Barbara J. Thompson
Rights and permissions
Open Access This is an open access article distributed under the terms of the Creative Commons Attribution Noncommercial License (https://creativecommons.org/licenses/by-nc/2.0), which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
About this article
Cite this article
Didkovsky, L., Judge, D., Wieman, S. et al. EUV SpectroPhotometer (ESP) in Extreme Ultraviolet Variability Experiment (EVE): Algorithms and Calibrations. Sol Phys 275, 179–205 (2012). https://doi.org/10.1007/s11207-009-9485-8
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11207-009-9485-8