SBUV/2 long-term measurements of solar spectral variability

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National Aeronautics and Space Administration , [Washington, D.C
Spectrum, Solar., Solar radia
Other titlesSBUV/2 long term measurements of solar spectral variability.
StatementMatthew T. DeLand, Richard P. Cebula.
Series[NASA contractor report] -- NASA-CR-204953., NASA contractor report -- NASA CR-204953.
ContributionsCebula, Richard P., United States. National Aeronautics and Space Administration.
The Physical Object
Pagination1 v.
ID Numbers
Open LibraryOL15502523M

Get this from a library. SBUV/2 long-term measurements of solar spectral variability. [Matthew T DeLand; Richard P Cebula; United States. National Aeronautics and Space Administration.].

data. Sensor aging related increases in the noise level of the NOAA-9 SBUV/2 solar spectral and Mg II data were noted. If further support becomes available, we hope to apply the techniques we have developed for correcting long-term instrument sensitivity changes to the NOAA-9 SBUV/2 irradiance data set.

Additional Activities. SSBUV to correct for long-term SBUV/2 instrument drift. Figure 2 presents spectral comparisons of the NOAA SBUV/2 and SSBUV data for the period through Since the long-term accuracy of the SSBUV calibration is better than 2%, these curves confirm the drift in the SBUV/2 long-term calibration suggested in Figure 1.

implications of design for solar research) • SBUV/2 instrument description • Calibration and long- term characterization • Data products (spectral irradiance, solar proxy indexes) • Status and future prospects. SBUV solar measurements were designed for on-orbit calibration, then developed into research product.\.

Solar irradiance measurements in the spectral range – nm at approximately nm intervals and at 1 nm resolution have been made by Solar Backscatter Ultraviolet (SBUV) series instruments continually since November Cited by: The NOAA-9 Solar Backscatter Ultraviolet Model 2 (SBUV/2) instrument is one of a series of instruments providing daily solar spectral irradiance measurements in the middle and near ultraviolet.

The NOAA 11 Solar Backscatter Ultraviolet, model 2 (SBUV/2) instrument, primarily designed to measure stratospheric ozone, also made daily spectral scan measurements of solar UV irradiance in the – nm region from February to October Cited by: SBUV/2 long-term measurements of solar spectral variability [microform] / Matthew T.

DeLand, Richard P. Solar radiation at the Barrow, AK, GMCC baseline observatory, [microform] / Ellsworth G. Dutt Identification of solar cycle 23 minimum from solar UV measurements [microform]: NOAA-9 and NOAA SBU.

The Mg II core to wing index was first developed for the Nimbus 7 solar backscatter ultraviolet (SBUV) instrument as an indicator of solar variability on both solar day rotational and solar. Measurements by, e.g. Labs and Neckel (), are of that the Langley method, they obtained an absolute value for the disk center intensity, I c (λ), at a given wavelength detailed corrections of I c (λ) for the center-to-limb variation (CLV; Neckel and Labs, ) they obtained a value for the solar irradiance by integrating over the full solar by: The sun synchronous near-polar orbits provide these measurements at the same approximate local time on a monthly basis, but this varies as the local equator crossing time changes with long-term orbit drifts.

Ozone profiles and total column amounts are derived from the ratio of the observed backscattered spectral radiance to the incoming solar.

Continuous measurements of solar ultraviolet radiation began in with the Nimbus-7 Solar Backscatter Ultraviolet (SBUV). 12 These measurements were followed by those from the Solar Mesosphere Explorer, 13 NOAA-9 SBUV/2, NOAA SBUV/2, the Upper Atmosphere Research Satellite Solar Stellar Intercomparison Experiment (SOLSTICE), 14 and the.

SBUV/2 Instrument. Solar Backscatter Ultraviolet Radiometer, developed by Ball Aerospace, Boulder, CO. The SBUV/2 is a non-scanning, nadir viewing instrument designed to measure scene radiance in the spectral region in 12 channels between nm and nm. Measurement of ozone profiles and of backscatter radiation.

Photo credits. Although solar ultraviolet (UV) irradiance measurements have been made regularly from satellite instruments for almost 20 years, only one complete solar cycle minimum has been observed during this period.

Solar activity is currently moving through the minimum phase between cycles 22 so it is of interest to compare recent data taken from the NOAA-9 SBUV/2 instrument with data Cited by: Variations of solar spectral irradiance from near UV to the interest for climate studies.

First, measurements of solar irradiance and irradiance variability from near UV to the IR are active regions as they evolve and move across the solar disk, the origin of the long-term contribution that causes. Solar radiation / compiled by Australian Inventions Pty.

Ltd; Nimbus-7 earth radiation budget calibration history. Part II. The earth flux channels [microform] / H. L SBUV/2 long-term measurements of solar spectral variability [microform] / Matthew T.

DeLand, Richard P.

Description SBUV/2 long-term measurements of solar spectral variability EPUB

NOAA-9 SBUV/2 is the first instrument to make continuous solar UV measurements for a complete solar cycle. Direct irradiance measurements (e.g., nm) from NOAA-9 are currently useful for examining short-term variations, but have not been corrected for long-term instrument sensitivity by: Additional SBUV/2 instruments have been flown on the NOAA, NOAA, and NOAA satellites.

Table 1 lists the periods of data available from these instruments. Note that Nimbus-7 SBUV, NOAA-9 SBUV/2, and NOAA SBUV/2 all collected ozone profile data for more than 12 years, and that NOAA SBUV/2 has operated for more than 7 years so far.

The Institute was organized so as to include state of the art lectures on most aspects of solar ultraviolet radiation and its effects. This was achieved by extended lectures and discussions given in five sessions by 27 lecturers and a demonstration of filed measurements and calibration techniques at.

Page Existing solar radiometers have sufficient short term precision to measure irradiance variations generated by solar rotation over time scales of days and weeks, but the precision of the measurements over the year activity cycle is much less secure because of instabilities in radiometric sensitivity.

In this paper, we present PMC results from five SBUV and SBUV/2 instruments covering more than 23 years (–), starting just before the maximum of solar cycle 21 and extending through the maximum of solar cycle The overlapping data sets from nearly identical instruments give an accurate picture of long‐term by: Measurements of solar irradiance, both bolometric and at various wavelengths, over the last two decades have established conclusively that the solar energy flux varies on a wide range of time scales, from minutes to the year solar cycle.

The major question is how the. Continuous measurements of solar ultraviolet radiation began in with the Nimbus-7 Solar Backscatter Ultraviolet (SBUV) These measurements were followed by.

Details SBUV/2 long-term measurements of solar spectral variability FB2

Temporal variability in erythemal radiation over Northern Eurasia (40°–80° N, 10° W–° E) due to total ozone column (X) and cloudiness was assessed by using retrievals from ERA-Interim reanalysis, TOMS/OMI satellite measurements, and INM-RSHU chemistry–climate model (CCM) for the – period.

For clear-sky conditions during spring and summer, consistent trends in erythemal Author: Natalia E. Chubarova, Anna S. Pastukhova, Ekaterina Y. Zhdanova, Elena V.

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Volpert, Sergey P. Smyshly. solar measurements have been used to monitor wavelength calibration. Changes made to the instruments since then have been modest. They are described in Frederick et al. Table 1 provides wavelengths and the spectroscopic pa-rameters for the NOAA SBUV/2 instrument.

The ozone sensitivity-weighted temperature was calculated using a cli. of long-term solar ultraviolet variations. atmos. Sci. 50, Effect of long-term solar variability in a two-dimen- sional interactive model of the middle atmosphere. #eophys. Res. 98, 20, 20, The influence of dynamics on two-dimensional model.

SPIE Digital Library Proceedings. CONFERENCE PROCEEDINGS Papers Presentations. On the Long- Term Stability of Gulf Stream Transport Based on 20 Years of Direct Measurements.

Geophysical Research Letters, 41(1), [/gl]. Spectral measurements of PMCs from SBUV/2 instruments. Atmos. Solar-Terr. Phys.,in press. [review article], Journal of Atmospheric and Solar-Terrestrial Physics, Vol Issue 7 Climatology of polar mesospheric clouds: Interannual variability and implications for long-term trends.

The Upper Mesosphere and Lower Thermosphere: A. vonSavigny, C., et al. (a), Impact of short-term solar variability on the polar summer mesopause and noctilucent clouds., CAWSES book vonSavigny et al. (b), Sensitivity of equatorial mesopause temperatures to the day solar cycle, Geophys.

Using standard subtractive arithmatic; it can be deduced that % of the solar spectrum air mass zero energy lies between nm and microns; and the second curve cited shows that approximately half of that total spectral range, is covered by H2O (aka “water”) molecular absorption bands; so one can reasoanbly expect that something.small, solar ultraviolet spectral irradiances are the major contributor to chemistry and thermodynamic processes in the stratosphere.

Climate model requirements for solar spectral irradiance stability and precision is at the edge of the capabilities of present instruments, e.g., OMI. Through careful analysis of long-term data records, solar.

The solar component of lower stratospheric (column) ozone variability was earlier discussed in Chapter 3 of WMO and was updated in Section of WMO (WMO,). Identification of the solar cycle signal in observed ozone was improved due to the absence of major volcanic eruptions over the past 15 by: