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260
Jul 12, 2010
07/10
by
NON
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No Abstract Available
Topics: SOLAR CONSTANT, SOLAR CYCLES, SOLAR MAXIMUM MISSION, VARIABILITY, CLIMATOLOGY, RADIOMETERS, SUNSPOTS
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162
Jul 11, 2010
07/10
by
Siscoe, G. L.; Crooker, N. U
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Understanding of the plasma depletion process in the dayside magnetosheath, the nature of magnetotail boundary motion, and the geometry of the magnetospheric boundary layers was examined. A model of the dayside boundary layers, based on the hypothesis that merging occurs only for strictly anitparallel fields was developed which provides a qualitative solution to the problem of the half-wave rectifier response of the magnetosphere to the solar wind electric field. Regarding magnetotail boundary...
Topics: IMP, MICROPROCESSORS, ORBITAL POSITION ESTIMATION, DATA PROCESSING, FLIGHT MECHANICS, SOLAR MAXIMUM...
297
297
May 21, 2011
05/11
by
Vandervegt, J. J. W
texts
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Two fourth order accurate Osher schemes are presented which maintain higher order accuracy on nonuniform grids. They use either a conservative finite difference or finite volume discretization. Both methods are successfully used for direct numerical simulations of flat plate boundary layer instability at different Mach numbers. Results of growth rates of Tollmien-Schlichting waves compare well with direct simulations of incompressible flow and for compressible flow with results obtained by...
Topics: POLARIMETERS, SOLAR MAXIMUM MISSION, ULTRAVIOLET SPECTROMETERS, ASTRONOMICAL POLARIMETRY, CATALOGS...
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259
Jul 21, 2010
07/10
by
Donaldson, K. E
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A linear model of the Cessna 402B was used to determine if the control power available to a Ride Quality Augmentation System was adequate to trim an engine-out. Two simulations were completed: one using a steady state model, and the other using a state matrix model. The amount of rudder available was not sufficient in all cases to completely trim the airplane, but it was enough to give the pilot valuable reaction time. The system would be an added measure of safety for only a relatively small...
Topics: ATTITUDE CONTROL, ORBITAL SERVICING, SERVICE LIFE, SOLAR ACTIVITY, SOLAR MAXIMUM MISSION, SPACE...
A catalog of a observations (experiments) obtained by the Ultraviolet Spectrometer and Polarimeter (UVSP) on the Solar Maximum Mission (SMM) from Nov. 1980 to Nov. 1989 is provided. The information for each entry includes the time of each observation, the observed position of the Sun, the spacecraft roll angle, the slit used, and instrument parameters such as raster size, pixel spacing, wavelength, polarimeter usage, gate time, etc. The document is split into three volumes: Volume 1 contains...
Topics: NASA Technical Reports Server (NTRS), ASTRONOMICAL CATALOGS, SOLAR MAXIMUM MISSION, POLARIMETERS,...
138
138
Jul 12, 2010
07/10
by
Lockwood, G. W
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Old UBV and recent uvby photometry of solar-type dwarfs and other standard stars yield an upper limit of variability (determined by observational errors) of about 0.004 mag rms. A factor two improvement in this upper limit is achievable.
Topics: PERIODIC VARIATIONS, SOLAR CONSTANT, STELLAR LUMINOSITY, CLIMATE, SATELLITE-BORNE INSTRUMENTS,...
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133
Mar 4, 2009
03/09
by
NASA LaRC Office of Education
movies
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NASA Connect Segment exploring ground-based instruments and rockets used to analyze and research the auroras. The segment also explains the concepts of data analysis and measurement in scientific research.
Topics: NASA Connect, Data Analysis, Measurement, Scientists, Engineers, Solar Minimum, Solar Maximum,...
Source: http://nasa.ibiblio.org/details.php?videoid=6017&start=0&subject=Technology
The documentation and user manual for the software used to invert the UVSP aeronomy data taken by the SMM are provided. The programs are described together with their interfaces and what inputs are required from the user.
Topics: NASA Technical Reports Server (NTRS), AERONOMY, OZONE, SOLAR MAXIMUM MISSION, COMPUTER PROGRAMS,...
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189
Jul 26, 2010
07/10
by
Stevenson, Charles G.; Katnik, Gregory N.; Higginbotham, Scott A
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A Debris/Ice/TPS assessment and photographic analysis was conducted for Space Shuttle Mission STS-28R. Debris inspections of the flight elements and launch pad are performed before and after launch. Ice/Frost conditions on the External Tank are assessed by the use of computer programs, nomographs, and infrared scanner data during cryogenic loading of the nomographs, and infrared scanner data during cryogenic loading of the vehicle followed by on-pad visual inspection. High speed photography is...
Topics: SOLAR ACTIVITY, SOLAR MAXIMUM MISSION, SOLAR PROMINENCES, SOLAR RADIATION, SOLAR ROTATION, TIME...
A catalog of observations (experiments) obtained by the Ultraviolet Spectrometer and Polarimeter (UVSP) on the Solar Maximum Mission (SMM) from Feb. 1980 to Nov. 1989 is presented. The information for each entry includes the time of each observation, the observed position of the Sun, the spacecraft roll angle, the slit used, and instrument parameters such as raster size, pixel spacing, wavelength, polarimeter usage, gate time, etc. The document is split into three volumes: Volume 1 contains...
Topics: NASA Technical Reports Server (NTRS), POLARIMETERS, SOLAR MAXIMUM MISSION, ULTRAVIOLET...
220
220
Jul 21, 2010
07/10
by
Abarbanel, S.; Gottlieb, D
texts
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No Abstract Available
Topics: DEGRADATION, TEFLON (TRADEMARK), TELEMETRY, SOLAR ARRAYS, SOLAR CELLS, SOLAR MAXIMUM MISSION,...
A long standing constraint on the study of micrometeorites has centered on difficulties in preparing them for analysis. This is due largely to their small dimensions and consequent practical limitations on sample manipulation. Chondritic micrometeorites provide a good example; although much has been learned about their chemistry and mineralogy almost nothing was known about such basic properties as texture and petrographic associations. The only way to assess such properties is to examine...
Topics: NASA Technical Reports Server (NTRS), MICROANALYSIS, MICROMETEORITES, MICROMETEOROIDS,...
A catalog of observations (experiments) obtained by the Ultraviolet Spectrometer and Polarimeter (UVSP) on the Solar Maximum Mission (SMM) from Feb. 1980 to Nov. 1989 is presented. The information for each entry includes the time of each observation, the observed position of the Sun, the spacecraft roll angle, the slit used, and instrument parameters such as raster size, pixel spacing, wavelength, polarimeter usage, gate time, etc. The document is split into three volumes: Volume 1 contains...
Topics: NASA Technical Reports Server (NTRS), POLARIMETERS, SOLAR MAXIMUM MISSION, ULTRAVIOLET...
294
294
Jul 12, 2010
07/10
by
Gough, D
texts
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A discussion of some of the issues raised in connection with the seat of the solar cycle are presented. Is the cycle controlled by a strictly periodic oscillator that operates in the core, or is it a turbulent dynamo confined to the convection zone and possibly a thin boundary layer beneath it Sunspot statistics are discussed, with a view to ascertaining the length of the memory of the cycle, without drawing a definitive conclusion. Also discussed are some of the processes that might bring...
Topics: CALIBRATING, GROUND TRUTH, ROCKET FLIGHT, SATELLITE-BORNE INSTRUMENTS, SOLAR CONSTANT,...
Solar flares accelerate both ions and electrons to high energies, and their X-ray and gamma-ray signatures not only probe the relationship between their respective acceleration, but also allow for the measurement of accelerated and ambient abundances. RHESSI observations have shown a striking close linear correlation of gamma-ray line fluence from accelerated ions greater than approximately 20 MeV and bremsstrahlung emission from relativistic accelerated electrons greater than 300 keV, when...
Topics: NASA Technical Reports Server (NTRS), ABUNDANCE, IONS, SOLAR FLARES, VARIABILITY, ACCELERATION...
The power tool which will be used to replace the attitude control system in the SMM spacecraft is being modified to operate from a self contained battery. The extravehicular mobility unit (EMU) battery, a silver zinc battery, was tested for the power tool application. The results obtained during show the EMU battery is capable of operating the power tool within the pulse current range of 2.0 to 15.0 amperes and battery temperature range of -10 to 40 degrees Celsius.
Topics: NASA Technical Reports Server (NTRS), SILVER ZINC BATTERIES, SOLAR MAXIMUM MISSION, SPACE TOOLS,...
The implementation of both sequential and batch methods of estimation on IMP-16 microprocessors was investigated. Simulated data was used from a tracking and data relay satellite whose target satellite was the Solar Maximum Mission. An interesting feature of the hardware was the use of two interconnected IMP-16's. Some preliminary results from the study, as well as the difficulties and advantages in the use of microprocessors, are presented.
Topics: NASA Technical Reports Server (NTRS), IMP, MICROPROCESSORS, ORBITAL POSITION ESTIMATION, DATA...
The 1349 study flares are considered addressing relationships between pairs of specific study paremeters; namely, H alpha rise time versus H alpha importance, X-ray class and H alpha decay time; H alpha decay time versus H alpha importance and X-ray class; and H alpha importance versus X-ray class. Mean H alpha rise time and decay time versus X-ray class and H alpha importance will also be discussed, and some final comments regarding the study flares are given.
Topics: NASA Technical Reports Server (NTRS), H ALPHA LINE, SOLAR FLARES, STATISTICAL ANALYSIS, SOLAR...
The major results from SMM (Solar Max Mission) are presented as they relate to the understanding of the energy release and particle transportation processes that led to the high energy X-ray aspects of solar flares. Evidence is reviewed for a 152- to 158-day periodicity in various aspects of solar activity including the rate of occurrence of hard X-ray and gamma-ray flares. The statistical properties of over 7000 hard X-ray flares detected with the Hard X-Ray Burst Spectrometer are presented...
Topics: NASA Technical Reports Server (NTRS), SOLAR FLARES, SOLAR MAXIMUM MISSION, SOLAR X-RAYS, ENERGY...
The purpose of the Solar Maximum Repair Mission is to restore the operational capacity of the satellite by replacing the attitude control system module and servicing two of the scientific instruments on board. The mission will demonstrate the satellite servicing capacity of the Space Shuttle for the first time.
Topics: NASA Technical Reports Server (NTRS), ATTITUDE CONTROL, ORBITAL SERVICING, SERVICE LIFE, SOLAR...
Topics: NASA Technical Reports Server (NTRS), SOLAR FLARES, SOLAR MAXIMUM MISSION, SOLAR POWER SATELLITES,...
255
255
May 31, 2011
05/11
by
Goyne, Christopher P.; McDaniel, James C
texts
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The Department of Mechanical and Aerospace Engineering at the University of Virginia has conducted an investigation of the mixing and combustion processes in a hydrogen fueled dual-mode scramjet combustor. The experiment essentially consisted of the ''direct connect'' continuous operation of a Mach 2 rectangular combustor with a single unswept ramp fuel injector. The stagnation enthalpy of the test flow simulated a flight Mach number of 5. Measurements were obtained using conventional wall...
Topics: ATMOSPHERIC PHYSICS, CROSSOVERS, IONS, PERIGEES, POLAR CAPS, POLAR REGIONS, TIDES, CONVECTION, FLOW...
Viewgraphs on orbital debris environmental monitor (ODEM) are presented. Topics covered include: Long Duration Exposure Facility (LDEF); interplanetary dust experiment; orbital debris clouds; mapping and modeling of orbital debris clouds; and solar maximum mission spacecraft.
Topics: NASA Technical Reports Server (NTRS), ENVIRONMENTAL MONITORING, MATHEMATICAL MODELS, SPACE DEBRIS,...
A mechanism called a deployment/retraction assembly (DRA) which provides not only a stable, but a deployable platform for the high gain antenna system (HGAS) aboard the Solar Maximum Mission (SMM) spacecraft is described. The DRA also has the capability to retract the system upon command.
Topics: NASA Technical Reports Server (NTRS), MECHANICAL DEVICES, PLATFORMS, SOLAR MAXIMUM MISSION,...
Langley, in the late nineteenth century, attempted to measure solar irradiance over an extended period of time in order to detect changes. The problem with this and other early attempts was that ground based measurements are not sufficiently accurate to measure solar irradiance fluctuations, which are on the order of 0.1%. It was not until the Active Cavity Radiometer Irradiance Monitor (ACRIM) experiment on the NASA Solar Maximum Mission (SMM) was launched in 1980 that continuous data with...
Topics: NASA Technical Reports Server (NTRS), CLIMATOLOGY, CORRELATION DETECTION, SOLAR RADIATION,...
Active Region 5395 produced an exceptional series of hard x ray bursts notable for their frequency, intensity, and impulsivity. Over the two weeks from March 6 to 19, 447 hard x ray flares were observed by the Hard X Ray Burst Spectrometer on Solar Maximum Mission (HXRBS/SMM), a rate of approx. 35 per day which exceeded the previous high by more than 50 percent. During one 5 day stretch, more than 250 flares were detected, also a new high. The three largest GOES X-flares were observed by HXRBS...
Topics: NASA Technical Reports Server (NTRS), SOLAR FLARES, SOLAR MAXIMUM MISSION, SOLAR X-RAYS, DATA...
Operational orbit determination of the Earth Radiation Budget Satellite (ERBS) and the Solar Maximum Mission (SMM) spacecraft using the Goddard Trajectory Determination System (GTDS) in the Flight Dynamics Facility (FDF) of the Goddard Space Flight Center (GSFC) has yielded an orbit solution data base of 3 years for ERBS and 8 years for SMM. One of the parameters in each data base is the drag variation parameter used in the GTDS atmospheric drag model; this parameter is solved routinely to...
Topics: NASA Technical Reports Server (NTRS), CORRELATION, EARTH RADIATION BUDGET, SATELLITE DRAG, SOLAR...
Observations of the spectral characteristics of solar radio bursts were made with new dynamic spectrum analyzers of high sensitivity and high reliability, over the frequency range 25-580 MHz. The observations also covered the maximum period of the current solar cycle and the period of international cooperative programs designated as the Solar Maximum Year. Radio data on shock waves generated by solar flares were combined with optical data on coronal transients, taken with equipment on the SMM...
Topics: NASA Technical Reports Server (NTRS), GROUND SUPPORT SYSTEMS, RADIO ASTRONOMY, SOLAR MAXIMUM...
A brief overview is presented for some of the large flare properties as observed during the prime SMM flare observation interval, 1980 to 1984. Two of these properties, namely their tendency to occur in groups and the strong effects of the 154 day periodicity, can be used to increase the probability of detecting large flares during the limited observing duration of Max 1991 balloon campaigns provided the solar flare characteristics of the 1991 solar cycle follows that observed in 1980 to 1984.
Topics: NASA Technical Reports Server (NTRS), BALLOON-BORNE INSTRUMENTS, EQUIPMENT SPECIFICATIONS,...
The difference between the methods that measure delta S, and those that measure variations in the solar luminosity, delta L, is discussed. It is shown that the past practice of simply relating delta S to delta L by geometrical arguments is not valid because of anisotropy of the solar radiation. It is concluded that direct techniques prove the existence of short term variability that is fully explainable in terms of the passage of active regions (spots and faculae) on the face of the Sun. The...
Topics: NASA Technical Reports Server (NTRS), PERIODIC VARIATIONS, SOLAR CONSTANT, STELLAR LUMINOSITY,...
The in-orbit repair of the Solar Maximum Mission satellite has provided an opportunity to continue observations of the Sun's outer corona, transition region, and bolometric flux through the decay phase and minimum of the solar cycle. The coordinated observation of the solar photosphere, chromosphere, and low corona from the ground is a necessary companion to understanding the full range of phenomena seen over the solar cycle by the spacecraft instruments. A program of such observations has been...
Topics: NASA Technical Reports Server (NTRS), ORBITAL SERVICING, SOLAR ACTIVITY, SOLAR MAXIMUM MISSION,...
The Solar Maximum Satellite developed electronic problems after operating successfully in space for several years. Astronauts on Space Shuttle mission STS-41C retrieved the satellite into the orbiter cargo bay, replaced defective components, and re-deployed the repaired satellite into orbit. The defective components were returned to Earth for study. The space-exposed surfaces were examined. The approach and objectives were to: document morphology of impact; find and analyze projectile residue;...
Topics: NASA Technical Reports Server (NTRS), IMPACT DAMAGE, PARTICLE COLLISIONS, SOLAR MAXIMUM MISSION,...
Since the Solar Maximum Mission (SMM) satellite was launched, a large database has been built up of experiments using the Ultraviolet Spectrometer and Polarimeter (UVSP) instrument. Access to this database can be gained through the SMM Vax 750 computer at Goddard Space Flight Center. One useful way to do this is with a program called USEARCH. This program allows one to make a listing of different types of UVSP experiments. It is evident that this program is useful to those who would wish to...
Topics: NASA Technical Reports Server (NTRS), COMPUTER TECHNIQUES, DATA RETRIEVAL, SEARCH PROFILES, SOLAR...
Three batteries were operated in parallel from a common bus during charge and discharge. SMM utilized NASA Standard 20AH cells and batteries, and LANDSAT-D NASA 50AH cells and batteries of a similar design. Each battery consisted of 22 series connected cells providing the nominal 28V bus. The three batteries were charged in parallel using the voltage limit/current taper mode wherein the voltage limit was temperature compensated. Discharge occurred on the demand of the spacecraft instruments and...
Topics: NASA Technical Reports Server (NTRS), CHARGE EFFICIENCY, NICKEL CADMIUM BATTERIES, SOLAR MAXIMUM...
The results of the discusions of a working group for the definition of a program for the forthcoming crest of solar activity, 1990 to 1993 are presented. The MAX '91 program described are intended to achieve important scientific goals within the context of the natural solar variability. The heart of the MAX '91 program is a series of campaigns oriented towards specific scientific problems, and taking place in the solar maximum period 1990 to 1993. These campaigns will take advantage of the...
Topics: NASA Technical Reports Server (NTRS), ASTRONOMY, MISSION PLANNING, NASA PROGRAMS, SOLAR MAXIMUM...
One rationale for the Space Shuttle program which was dramatically realized during the repair of the Solar Maximum Mission (SMM) is the efficiency of in-orbit satellite servicing. An unexpected benefit of this repair mission was the return of parts of the Solar Max satellite which had been exposed for four years to the space environment. Studies conducted on these parts have yielded valuable data on the micrometeorite flux and composition at shuttle altitudes during this time period. The...
Topics: NASA Technical Reports Server (NTRS), ACCUMULATORS, ARTIFICIAL SATELLITES, COLLECTION, COSMIC DUST,...
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238
Jul 21, 2010
07/10
by
Ayala, S
texts
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The present capabilities of various Latin American countries in the area of satellite communications are discussed. Their current needs in this area are covered and how these needs are now being met, as well as prospects for future advancements.
Topics: ANNIHILATION REACTIONS, NEUTRONS, NUCLEAR FUSION, SOLAR MAXIMUM MISSION, GAMMA RAY SPECTROMETERS,...
The Solar Maximum Mission was used to study solar coronal phenomena in hard X-radiation, since its instrument complement included the first solar hard X-ray telescope. Phenomena related to those discovered from OSO-5 and OSO-7 observations were emphasized.
Topics: NASA Technical Reports Server (NTRS), PHOTOSPHERE, SOLAR CORONA, X RAY SOURCES, ELECTRON TRANSFER,...
Solar flares accelerate both ions and electrons to high energies, and their X-ray and gamma-ray signatures not only probe the relationship between their respective acceleration, but also allow for the measurement of accelerated and ambient abundances. RHESSI observations have shown a striking close linear correlation of gamma-ray line fluence from accelerated ions > approx.20 MeV and bremsstrahlung emission from relativistic accelerated electrons >300 keV, when integrated over...
Topics: NASA Technical Reports Server (NTRS), SOLAR FLARES, SOLAR MAXIMUM MISSION, GAMMA RAYS, HIGH ENERGY...
The Active Cavity Radiometer Irradiance Monitor (ACRIM) total-irradiance data from the Solar Maximum Mission have given a first comprehensive view of solar variability in the stellar sense. Five types of solar variability have been identified thus far. These have small amplitudes, less than a few tenths of one percent, and are at levels generally not yet detectable on other stars. The possible stellar analogs are interesting physically, and in particular may help us to understand solar behavior...
Topics: NASA Technical Reports Server (NTRS), IRRADIANCE, LUMINOSITY, RADIOMETERS, SOLAR ACTIVITY, SOLAR...
A comet nucleus sample return mission in terms of its relevant science objectives, candidate mission concepts, key design/technology requirements, and programmatic issues is discussed. The primary objective was to collect a sample of undisturbed comet material from beneath the surface of an active comet and to preserve its chemical and, if possible, its physical integrity and return it to Earth in a minimally altered state. The secondary objectives are to: (1) characterize the comet to a level...
Topics: NASA Technical Reports Server (NTRS), APHELIONS, COMET NUCLEI, PERIHELIONS, SOLAR MAXIMUM MISSION,...
It has been well established that polar orbiting satellites can see mild to severe charging levels during solar minimum conditions (Frooninckx and Sojka, 1992, Anderson and Koons, 1996, Anderson, 2012). However, spacecraft operations during solar maximum cannot be considered safe from auroral charging. Recently, we have seen examples of high level charging during the recent approach to solar maximum. We present here a survey of charging events seen by the Defense Meteorological Satellite...
Topics: NASA Technical Reports Server (NTRS), DMSP SATELLITES, SOLAR CYCLES, SOLAR MAXIMUM MISSION,...
The Ultraviolet Spectrometer/Polarimeter Instrument (UVSP) for the Solar Maximum Mission (SMM) was based on the re-use of the engineering model of the high resolution ultraviolet spectrometer developed for the OSO-8 mission. Lockheed assumed four distinct responsibilities in the UVSP program: technical evaluation of the OSO-8 engineering model; technical consulting on the electronic, optical, and mechanical modifications to the OSO-8 engineering model hardware; design and development of the...
Topics: NASA Technical Reports Server (NTRS), NUMERICAL CONTROL, POLARIMETERS, SOFTWARE ENGINEERING, SOLAR...
The reinforcement learning techniques developed at Ames Research Center are being applied to proximity and docking operations using the Shuttle and Solar Maximum Mission (SMM) satellite simulation. In utilizing these fuzzy learning techniques, we also use the Approximate Reasoning based Intelligent Control (ARIC) architecture, and so we use two terms interchangeable to imply the same. This activity is carried out in the Software Technology Laboratory utilizing the Orbital Operations Simulator...
Topics: NASA Technical Reports Server (NTRS), ARCHITECTURE (COMPUTERS), FUZZY SYSTEMS, NEURAL NETS, SPACE...
The following efforts were completed in support of the Solar Maximum Mission (SMM): (1) the evolution of solar vector photospheric magnetic fields in a flare-producing active region was studied; (2) an algorithm was developed to generate maps of force-free magnetic field strengths at varying heights in the solar atmosphere; and (3) the study of the physical state of the material confined along entire magnetic loops was advanced with the use of magnetic field extrapolation.
Topics: NASA Technical Reports Server (NTRS), ALGORITHMS, SOLAR CORONA, SOLAR FLARES, SOLAR MAGNETIC FIELD,...
The Ultraviolet Spectrometer and Polarimeter (UVSP) on the Solar Maximum Mission (SMM) spacecraft was used extensively to study the spatial morphology and time variability of solar active regions in the far UV (at approx. wavelength of 1370 A) since July 1985. The normal spatial resolution of UVSP observations in this 2nd-order mode is 10 sec., and the highest temporal resolution is 64 milliseconds. To make a full-field, 4 min. by 4 min. image this wavelength using 5 sec. raster steps takes...
Topics: NASA Technical Reports Server (NTRS), FAR ULTRAVIOLET RADIATION, POLARIMETERS, SOLAR FLARES, SOLAR...
The active cavity radiometer (ACR) measures the total solar irradiance to determine the magnitude and direction of variations in the total solar radiative output. The ACR is an electrically self calibrating cavity pyroheliometer capable of measuring the total solar irradiance with an absolute accuracy better than 0.2% and capable of detecting changes in the total irradiance smaller than 0.001%. The data will be used to study the physical behavior of the Sun and the Earth's climate.
Topics: NASA Technical Reports Server (NTRS), IRRADIANCE, PYROHELIOMETERS, RADIOMETERS, SOLAR...
An analysis of UVSP wavelength drive hardware, problems, and recovery procedures; radiative power loss from solar plasmas; and correlations between observed UV brightness and inferred photospheric currents are given.
Topics: NASA Technical Reports Server (NTRS), POLARIMETERS, SOFTWARE ENGINEERING, SOLAR MAXIMUM MISSION,...
The activity cavity radiometer irradiance monitor is supplying the first high precision data on solar total irradiance at the Earth. Thee classes of variability were discovered: large variations of amplitudes up to 0.2%; small high frequency variations in the form of a continuum in the periodogram, extending up to the Nyquist frequency; and sharp spikes at frequencies corresponding to the individual p modes already known from radial velocity measurements. The observed variations (up to 0.3%, on...
Topics: NASA Technical Reports Server (NTRS), RADIATION MEASUREMENT, SOLAR CONSTANT, SOLAR MAXIMUM MISSION,...
The design requirements of the polarimeter were established by the scientific optical objectives of the experiment to be launched aboard the Solar Max Mission which will study active solar regions. The polarization of the light is accomplished by a rotating magnesium fluoride quarter wave plate. The quarter wave plates are rotated in 22 1/2 degree steps about an axis coincidental with the light beam. As the light beam passes through the wave plate, the transformation that occurs can be...
Topics: NASA Technical Reports Server (NTRS), HIGH RESOLUTION, MECHANICAL DRIVES, POLARIMETERS, SOLAR...
