isis-a press kit

8/8/2019 Isis-A Press Kit

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't(vQ-99&6'NE SNAT!ONAL AERONAUTICS AND SPACE ADMINISTRATION TE LS WO 2-41.35WASHINGTON,D.C. 20546 WO 3-6925

FOR RELEASE: SUNDAYJIanuary 26, 1969

RELEASE NO: 69-14

PROJ ECT: ISIS-Ar

contentsS 3ENSRAL RELEASE---------------------------------------------4SHE ION OSPHE RE ----------------------------------------------5-6THE ISIS-A SATELLITE----------------------------------------7'ISiS-A EXPEHRh1EiiTS-------------------------------------------8-9DIFFERENCES FROM THE EARLIER IONOSPHERE SATELLITES ---------- 10ISIS-A FACILITIES--------------------------------------------11-13DELTA LAUNCH ROCKET-------------------------------------------14Delta Statistics---------------------------------------14-1.5Flight Events--------------------------------------------16ISIS-A T E A M --------------------------------------------------17Program Participants------------------------------------18-19-0- 1/21/69

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E "iVs IATIONAL AER0NAU'ICS AND SPACE ADMINISTRATION Tr.LS. 2-4 I)WASHIf GTON,D.C. 205/6 WO 3-6975

FOR RELEASE: SUNDAYJanuary 26, 1969RELEASE NO: 69-14

ISIS-A LAUNCH SCHEDULED

The joint Canddian-United States program of ionosphericresearch will move into a new stage with the launching ofthe Canadian satellite, ISIS-A, on a National Aeronauticsand Soace Administration Delta rocket from the WesternTest Range, Lompoc, Calif. no earlier than Jan. 29.

ISIS-A (International. Satellite for IonosphericStudies) is the chird Canadian ionospheric satellite andthe second of five satellites in a cooperative Canadian-U.S. effort. It will continue the study of the ionospherefrom above (topside sounding) successfully begun with the

Alouette I satellite.More information )n the nature and behavior of the

ionosphere is needed to improve long-range radio trans-missions which are possible only through use of the ionosphereto reflect them back to Earth.

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-2-Measu-ements of the ionosphere from above were begun

with the Canadian satellite Alouette I launched Sept. 29,1962 under a cooperative agreement between the CanadianDefense Research Board (DRB) and NASA.

Alouette I, designed, engineered and constructedin Canada, established a longevity record and continues

to return useful data after more than six years in orbit,

The success of Alouette I led the U.S. and Canadato agree to an expanded cooperative program of ionosphericstudies to extend through an entire solar cycle.

The ISIS series began with ISIS-X which was launchedNov. 29, 1965 and consisted of the Canadian satelliteAlouette II and the NASA Explorer XXXI (Direct MeasurementExplorer). Both satellites provided excellent data andcontinue to transmit.

ISIS-A 'arries five Canadian and five United Statesexperiments. The satellite will be placed in a near-polarhighly elliptical orbit- ranging from a high point of 2,200statute miles (about 3,500 km) to a lw point of 300 miles{about 565 km). It; weighs 532 pounds and has a planned orbitalp!'.ciod of 128 minutes.

ISIS-B and C are scheduled to be launched at aboutone-year intervals after TSIS-A.

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The ISIS program is conducted jointly by NASA andthe Canadian Defence Research Boavd wlirh each agency de-fraying the costs of Its own portions of the program.

Defence Research Tedecommunlcations Establishment(DRTE) Ottawa, Ontario, a palt of the FIRB, Is responsiblefor management of tIie Canad i ar n portiLot of the pr),ogram andIs the satellite design authority. NASA's Goddard SpaceF.light Center, Greenbelt, JLd.A responsible for the U.S.portion of the progratm. ','he Ke:rnnedy '"pace Center's WesternTest Range, Lompoc, CalI.f. wJ.)1 provide pre-launch andlaunch support.

The NASA STADAN tracking notwovk, operated by GoddardSpace Flight Center, wi-fL track tne ISIS satellite andacquire telemetry data. Th; rietwovk will be augmented bystations operated by the Cantedlan government,, by France,the UnIted Kingdom and Movway aind by rSS; for the U.S. Itis expected that stations in Antarctica, Japan, Australiaand India will augmnint this effort as the program evolves.

Scientist;s in Australia, Endia, Hong Kong, Japan,France, and United Kingdom and Norway are actively partici-pating with tbheir Canadian and U.S. counterparts in theISIS Working Group which recommencds topside ionosphericresearch activities using the satellites in the ISIS programwhich often relate to similar ground-based activities carriedout in a number of countries around the world.

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After evaluation by the principal investigators,scientific results will be made available Jo the worldscientific community.

ISIS-A prime contractor is the RCA Victor Co., Ltd.,Montreal, Canada, under supervision of the DRTEo The Deltarocket is built by the McDcnnell Douglas Corp., Santa Monica,Calif.

(END OF GENERAL RELEASE: BACKGROUND INFORMATION FOLLOWS)


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THE IONOSPHEREScientists engaged in the ISIS-A program are concernedprimarily with the upper latitude regions of the ionosphere.Some of the radiation directed from the Sun towards the Earthis absorbed in the ionosphere which extends upwards from ap-*f proximately 35 miles above Earth. During this absorption* process, neutral air particles are split into electrically-charged ions and electrons. They create, in effect, an elec-

r trical conductor with the ability to reflect radio waves fromtransmitters to receivers and hence to guide ihese waves aroundthe curvature of the Earth by a process of successive reflection.When the ionosphere becomes disturbed following solarstorms or other phenomera associated with the Sun, its reflect-ing properties are affeeted. Consequently, radio communicationsare disrupted, somet~jneo for long periods. Hence, there is adeep interest in studying the upper atmosphere in order to findmethods of overcoming the effects of ionospheric disturbances.An unusual feature of the polar and subpolar ionospherestems from seasonal variations of the polar atmosphere's solarillumination -- continuous daylight in summer and continuousnight during the winter. A second feature of the ionosphere

at high latitudes involves effects on ionization created bycharged solar particles.The "auroral ionosphere" exhibits a wide variety of dis-turbed conditioins. It resembles that in the temperate zonesonly during quiet conditions and then only on rare occasions.Perhaps the worst ionospheric condition, from the stand-point of communications, is the so-called "polar blackout.'During such occurrences, reflections cannot be obtained fromthe ionosphere by most ground-based ionosphere recorders(called ionosondes). Consequently, the ionograms (or recordsof electron plasma frequency as related to height) obtained aresometimes completely blank. Rocket flights and other experimentshave shown that these Dolar blackouts stem from an abnormal in-crease in the ionization of a specific ionospheric region whichis caused by solar particles. The effect on communications is

t ~~a complete cessation of radio sky-wave translnissions at high ifrequencies due to absorption in the D-region."Sudden iornospheric disturbances" also cause loss of com-munications, producing abrupt and simultaneous radio fadeoutthroughout the hemisphere which flay last from 10 minutes to anhour. Polar blackouts, however, are more gradual in their be-ginning and recovery and last for substantially longer periods --

sometimes continuously during the daylight hours for severalconsecutive days.4-more-

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The "ionospheric storm" is another type of disturbanceintensified in the auroral zones. It is characterized by ageneral Instability of ionospheric conditions, a decrease inthe maximum density of ionization and an increase in absorp-tion. The maximum employable frequencies are much lower thannormal during these periods and the restricted communicationsspectrum is subject to rapid fluctuations in signal intensity.An ionosphere storm is usually accompanied by a period of un-usual fluctuation in terrestrial magnetic intensity.The topside satellite sounder technique (Alouette I andII, Explorer XXXI) developed under this program is the only

one known that can provide worldwide electron-density profilessynoptically above the height of maximum electron density ofthe ionosphere. (Ground stations can only sound up to themaximum electron density.) These satellite soundings permitthe investigation of the physical properties of the upper iono-sphere as a function of altltuSe, time and geographical location.In addition to its scientific value, increased knowledgegained about the ionosphere can be applied directly to commun-ications and tracking operat.Lns. The importance of the iono-sphere to terrestrial radio communication is well klown. Pre-dictions of ionospheric storms and disturbances are often un-satisfactory because they are based on inadequate information.Because a thorough understanding of natural phenomena is a pre-re ,uisite to their intelligent use, improved knowledge of theentire miechanism should Lead to more precise forecasts.The present; prediction of maximum usable frequencies forcommunications purposes is based on ionosorndes from ground-based ionospheric stations. This information was consideredof' sufficient importance to Justify the establishment of about150 ground-O)ased ionospheric sounding stations throughout thfeworld. This number of stations, however, still does not permitaccurate worldwide mapping of the bottom-side ionosphere: andthe information from each station is insufficiently detailed.Two of the most important observations obtained by thesestations are the height and density of maximum ionization inthe ioniosphere. Topside sounders are capable of providingthis Information, together with the complete electron densityproiplle fron tWie electron peak to the altitude of the satellite,

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-7-THE ISIS-A SATELLITE

In ISIS-A, direct measurements will be combined with thetopside sounder to measure most of the Important ionosphericparameters at the same time and in. he same location in space.Heavier than its predecessor satellites Alouettes I and II,ISIS-A will weigh 532 pounds, Like Its predecessors, it isspheroid in configuration. Its outside surface is covered withmore than 11,000 solar cells to power the batteries within.ISIS-A is fitted with two extendable antennas, 240 and 62feet long, respectively, to sound or probe the upper levels of

the ionosphere. Four telemetry antennas project from the baseof the spacecraft to accept commands from the ground and totransmint data gathered by the satellite to ground stations.Quadraloop antennas are mounted around the satellite's equatorto radiate beacon transmissions, and two antenna-like boomssupport probes for use in several of the onboard experiments.The 50-inch-diameter by 42-inch-high spacecraft will belaunched in an elliptical polar orbit - 300 statute miles atits nearest (perigee) and 2,200 statute miles at its farthest(apogee) points from Earth.The satellite's 10 experiments and expanded facilitieshave necessitated power requirements considerable greater thanthose employed in its predecessors. A new feature, designedfor the ISIS spacecraft series, is a spin and attitude systemto control spin action in space and also to control theattitude of the spacecraft relative to the Sun and the Earth.NASA has provided final thermal and environmental pre-launch testing facilities and associated manpower at theGoddard Space Flight Center, Greenbelt, Md.

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-4ISIS-A EXPERIMENTSiISiS-A is a more complex spacecraft than the AlouettesI and II, and shows the evolution of the program from a.topside sounder to virtually an observatory class satellite.Alouette I is conducting t'our experinents and Alouette II hasfive experiments. The ten experLnents carried by ISIS-A are:

DRTE Experiments:* A swept high frequency sounder to probe th e ionosphereover great distances.* A fixed frequency sounder to probe the ionosphere at six

specific frequlrncies.* A radio noise experiment to measure ionospneric andextraterrestrial radio noise in the cater atinosphere.* A special radio receiver C'or measuioing the very lowfrequency MVYF) signals generated by lightning flashesand other natural phenomena4 Artificial generation ofsome of these phenomena will also be attempted by agenerator in the satellite. In addition, a VLF exciter

will stimulate resonances in the plasma, the area inthe upper atmosphere comprising many gaseous components,enveloping and in the immediate vicinity of' the orbitingspacecraft.NASA Experiment:

* A cylindrical electrostatic probe to measure the tem-perat-ure and concentrations of electrons near thespacecraft.

National Research Council of Canada Experiment:* Detectors of energetic particles to provide data whichwill aid in the understanding of:

- the mechanism responsible for the production and con--trol of the particles which populate the outerradiation zone and which sometimes precipitate intothe atmosphere;- the related problem of entry into the Earth'8s mag-netic field of solar and other particles, and- the general distortions which occur in the Earth'smagnetosphere as a result of its interaction withthe solar wind.

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USAF Cambridge Research Laboratories Experiments:* A detector (ion mass spectrometer) that identifies thetypes of positively charged particles in the vicinity

of the satellite, such as protons, oxygen ions andhelium ions, and* A three-inch spherical electrostatic probe, fitted tothe end of a boom that projects from the main bodyof the satellite, to measure the temierature numbersand density of positively charged particles (ions).

University of Western Ontario Experiment:* A radio beacon whose transmissions when received at aground station will give informa.tion about Ionosphericstructure and irregularities.

U.S. Southwest Center for'Advanced Studies Experiment:* A detector of particles with somewhat lower energies,such as the electrons that precipitate out of theupper atmosphere and cause visual azr-oral displays.

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DIFFERENCES FROM THE EARLIER IONOSPHERE SATELLITES

The ISIS A ionospheric sounder resembles closely thatcarried by Alouette II. The frequency coverage has beenextended however, because the satellite will be lau6nchedinto a higher orbit and later in the solar epoch. Similarly,transmitter power has also been increased.The fixed frequency sounder is a new experiment inthe ISIS series to study irregularities in the ionosphere'shorizontal plane. Essentially, the difference between the

two sounder experiments is that the swept frequency sounderwill sample at the same frequency at intervals of about 200kilometers or 108 nautical miles whereas the fixed frequencysounder will sample at intervals of about 0.27 kilometers or0.1.4 nautical miles.

The VLF experiment will include a swept frequency trans-matter to stimulate resonances among ions similar to thosepreviously reported with electrons at higher frequencies.

Because some high latitude ionospheric phenomenaappear to depend on low energy electrons, the lower energylimit of electron detection has been reduced in the energeticparticle experiment from that carried in Alouette II.

More information regarding ion density and temperaturewill be gained from the ion probe experiment and ion masseswill be determined by the ion mass spectrometer. Two ins-truments for this experiment will pernit measurements tobe taken along the satellite velocity vector at all latitudes.The beacon designed by the University of WesternOntario will measure scintillations, particularly in theauroral zone.

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ISIS-A FACILITIESAttitude Sensing 3 axIs magnetometerThermistorsSolar aspect sensorAttitude Control Spin maintenance and spin axisattitude control by magnetictorquingTracking Beacon 250'mWTelemetry 4W FM 100 KHz bandwidth2W PCM/PM 50 KHz bandwidth4W 400 MHz 500 KHz bandwidth, forfast playback of tape recorder, ordirect transmission of sounder orVLF experiment.Command 216 possible commandsProgrammer: 5 commands can bestored together with their times ofexecution. These commands may be,selected from a group of 10.

ClockData Storage Tape recorder 3000-ft. tape.Record/playback speed ratio 1:s4.4 tracks used as: 1) PCM at 2500bits/inel2) Sounder up to 10 KHz3 VLF up to 20 KHZ4 Reference tone and clockAntennae Sounder: crossed dipoles 240

and 62 ft. Telemetry (136 MHz) andcommand: Turnstile whipsTracking beacon and 137 Mhz beacon:quadraloop 40u MHz telemetry: annularslotPower 11,136 n-on-p type solar cells:Ni-Cd (Nickel-cadmium) batteries

The most significant difference in the facilitiesprovided by ISIS A and its predecessors in the ionosphere-probing satellite series is in the provision of on-boarddata storage.

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During the initial design stages of Alouette Tthis was considered impractical. Because Alouette IIemploys the same spaceframe as Alouette I, there would havebeen no room for data storage, quite apart from the lack oftime available for development. Despite the large numberof ground stations available Pur data collection, however,there are large areas around the world from which data recep-tion Is unavailable.It was decided, therefore, to fill, these gaps by

data storage facilities within ISIS A, and its specially-developed 'ape recorder will be capable of storing informationsimultaneously from all cxperiments.Data storage has necessitated other changes in thespacecraft's facilities. The experiments and the taperecorder must be able to be switched on when the spacecraftis out of range of any ground stations. Consequently, aprogrammer is provided capable of storing Live commands aswell as the times at which each is to be implemented. Eachcommand may be selected from a list of 10 of those mostcommonly employed. A clock will make it possible to switchon the tape recorder at any desired time. The actual timeat which data is obtained will also be recorded and the clockwill be reset.The telemetry requirement has been altered also as aresult of data storage requirements. If the number of datalinks had remained the same as in the Alouette satellites,data woula be gathered from a specific location at the expenseof data at the station where the recorded information will bereceived. An extra link in ISIS A will obviate this short-coming.In order to receive all the information stored in the

tape recorder during one pass, this additional data link iswide-band - 400 Mriz link with a bandwidth of 500 KHz. Itwill be used as well to transmit the sounder or VLF data inthe event of trouble with the wide-band 136 MHz link whosetransmitters have been duplicated in the spacecraft.In the predecessor Canadian satellites, data fromexperiments other than the sounder or VLF and also house-keeping information are transmitted in continuous form byemploying frequency multiplexing. In ISIS A, these datawill be time multipl.xed using pulse code modulation. MTischange in the telemetry system should make automatic data re-duction simpler at the ground centers concerned.

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While the attitude sensing instrumentation will besimilar to that on Alouette II, attitude control has beenincorporated in ISIS A.Alouette I has shown marked changes in the attitudeof its spin axis and rapid decay in its spin rate. The spinaxis attitude changes can be explained by a combination ofgravity gradient effects on the long antennas and magneticmovement of the spacecraft - the excessive spin rate decayis due to thermal bending of the antennas. These factors

cause the spacecraft's centre of pressure to be displacedfrom its centre of gravity and solar radiation pressure isthen able to exert a decelerating torque. On ISIS Athere-fore, spin rate will. be controlled by magnetic torquing towithin the limits of l and 3 rpm while spin axis attitudewill also be capable of being modified.To meet the requirements of ISIS A extra transmitters,more antennas are required. A quadraloop antenna is mountedaround the midsection of the spacecraft and an annular slothas been c-ut in the section which is the top of the space-craft at lauinch.Addilona: experiments and facilities require increasedpower supplies. ISIS A's more than 11,000 solar cells willbe capable of providing five hours per day of full space-craft operations under minimum Sun conditions after a year inorbit, providing of course, the known radiation environmentdoes not change.ISIS A prime contractor is the RCA Victor Co., Ltd.,Montreal, Canada, under supervision of the DRTE.

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SPACECRAFT

THIRD STAGEMOTOR-PETAL TRUSS(4)-/

SECOND STAGE8BLAST BAND (4) PROPULSION SYSTEM-

-- SPACECRAFTAl TA(,H FITTIN(G

R~~4tAiNN(STRAP (2)

(DADAPTER-----~Ci--SPIN ROCKET MOTOR

-iHIRD STAGE /SPACECRAFT FAIRINGLAUNCH RAILS (3)

FIRST STAG&-

TRANSITION SECTiON-

Lawnch Vehiic-/Spacceraiti Separa- ion


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FAIRING SPACECRAFT FITTINGTHIRO STAGE

SPACECRAFT FAIRING F O iiSPIN TABL&E -GYROSCOPE ASSY

TRANSPONDER - FUEL TANK_________VHF TM -GUIDANCE ANTENNA

COPARTMENT OSAFETYN SPXIDIZRANKANTENNA

SECON9 STAGE CCK TAEAhENAO NITRTOGEN SPHERES(6)SC4OSAESECOND STAGE ANTENNA_____PROPULSION SYSTEM iOLN ErLNrENNA / AJIO-118E THRUST

J- - HELIUV! -- g J921 INTERfACEADAPTER SPHERES() /CONNECTOR,SECT1ON ATTITUIDE AND FLIGHT CONTROLLERU- RO~F4LLONTROL CNRLETRANSITION SYSTEM

-. SECTION ADAPTER SECTOINVERTER

| CONTROL BATTERY \ -RATE GYROIpIRANGESAFETY DISTRIBUTION Bo xf TNANTENNAfUEL TANK AC DISTRIBUTION BOX

IFUEL TN

TELEMETR -PITCH B YAWCENTER TELEMETRY- RATE GYRO

BODY SECTION RANGE SAFETY-f -RECEIVERFIRST STAGE IDO LEVEL LOX- OXIDIZER TANKFLOAT SWITCH

LIOUID OXYGEN SOLID OTORTANK NSE FAIIN

ENGINESOIMOO---SECT ON

-FIRST STAGE ENGINE

Impi oved Delta Launch Vehicle

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DELTA LAUNCH ROCKET

The ISIS A will be launched by NASA's Thrust AugmentedImproved Delta rocket. Launch will be from the Western TestRange, Calif. The three-hour ISIS A launch window opens at1:30 a.m. EST Jan. 30. The initial launch azimuth is 195degrees.NASA's pThrust Augmented Improved Delta rocket consistsof a thrust-augmented Thor first stage, an enlarged Deltasecond stage, and the FW-4 third stage.Delta project management is directed by NAUA'sGoddard Space Flight Center, Greenbelt, Md. Launch operationsare conducted by the Unmanned Launch Operations Directorate,NASA Kennedy Space Center, Fla. The Mclonnell/Douglas Corp.,Santa Monica, Calif., is Delta prime contractor.'

Delta S .I titicsThe three-stage Delta for the ISIS A mission has the

following characteristics:Height: 92 feet (inicludes shroud)Maximum Diameter: 8 feet (without attached solids)Liftoff Weight: about 75 tonsLiftoff Thrust: 270,000 pouads (including strap-on solids)First Stage Eliquid only): Modified Thor, producedby Douglas Aircra t Co., engineb produced by Rocketdyne

Division of North American Aviation.Height: 51 feetDiameter: 8 feetWeight: approximately 53 tonsThrust: 172 000 poundsBurning Time: 2 minutes, 30 secondsPropel'.ants: RP-1 kerosene is used as the fuel and

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Strap-on Solids: Three solid propellant Castor IIrockets produced by the Thiokol Chemical Corp.Height: 25 feetDiameter: 3 feetWeight: 30,000 pounds (all three solids)Thrust: 100,000 pounds (all. three solids)Burning time: 38 secondsPropellants: solidSecond Stage! Produced by the Douglqs Aircraft Co.,utilizing the Aerojet-General Corp., AJ-10-118E propulsionsystem; major contractors for the Auto-pilot system includeMinneapolis-Honeywell, Inc., Texas Instruments, Inc., andElectrosolids Co'p.Height: 16 feetWeight: 6- tonsDiameter: 4.7 feetThrust: 7,700 poundsBurning Time: 6 minutes, 26 secondsPropellants: Liquid-Unsy.nnetrical Dimethyl Hydrazine(UDMHJ for the fuel and Inhi.bited RedFuming Nitric Acid 1-RF'NA) for the oxidizer.Third Stage: 'W-4 developed by the United Technology

Corp.Height; 5 fteet, 2 inchesDiameter: 19?6 inchesWeight: about 660 poundsTh.rust: 5,450 pounds3urniang Time: 31 secondsPropellant: solid

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-16-Flight Events

Nominal times forx major flight events during theISIS A mission are as follows:Event Time From Lift-Off

Strap-on Solids Burnout 43 secondsSeparation of Solids Y0 secondsMain Engine Cut-off 150.7 secondsSecond Stage Ignition 156.5 secondsShroud Jettison 162.7 secondsSecond Stage Cut-off 5iO secondsThird Stage Ignition 734r.7t secondsThird Stage Burnout 765.5 secondsSpacecraft Separations 879.7 seconds

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Experimenters

G. L. Nelms and C. E. Petrie swept Frequency SounderDefense Research TelecommunicationsEstablishment (DWrE)W. Calvert and T. VanZandt, ESSA Fixed Frequency SounderResearch Laboratories, EnvironmertalScience Services Administration,.C. E. Petrie and G. L. Nelms, DRTER. E. Barrington, D~rE VLF ReceiverI. B. McDiarmid and J. R. Burrows Energetic Particle DetectorNational. Research CouncilW. J. Heikkila, Graduate Research Soft Particle SpectrometerCenIter of the SouthwestR. S. Narcisi , A ir Force Ion Mass SpectrometerCambridge Research LaboratoriesL. H. Brace and J. A. Findlay, Cylindrical ElectrostaticNASA/Goddard Space ?light Center ProbeR. C. Sagalyn and M. Smiddy, Spherical ElectrostaticAir Force Cambridge Research AnalyzerLaboratories?. A. Forysth, E. A. Forsyth, 136/137 Mc/s BeaconG. F. Lyon, E. H. Tull, Univ-ersity ot Western OntarioT. R. Hartz, DRTE Cosmic NOisu

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Program Participants

Defense Research Telecommunications EstablishmentF. T. Davies Director-GeneralC. D. Florida Project DirectorDr. C. A. Franklin Chief EngineerHarold R. Raine Project OfficerNorman A. Harrison Mechanical Project Engineer

NASA HeadquartersJ. L. Mitchell Director, Physics & Astronomy

ProgramsT. L. Fischetti. Program Manager, Geophysical

ObservatoriesF. W. Gaetano Associate Program ManagerE. R. Schmerlinq Program ScientistI. T. Gillam Delta Program Manager

Goddard Space Fliqht CenterDr. John F. Clark Director, Goddard Space Flight CenterE. Dale Nelson ISIS-A Project ManagerJohn E. Jackson ISIS-A Project ScientistWilliam R. ScItindler Delta Project Manager

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Kennedy.Space Center

Dr. Kurt H. Debus Director, KSC

Robert H. Cray Di.rect-r, Unmanned Launch OperationsKSC

Henry Et. Van Goey Manager, Unmanned Launch OperationsWestern Test Range

Wilmer C. Thacker Chief, Delta Cperations, KSC/WTR

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CWCv NATIONAL AERONAUTICS AND SPACE ADMINISTRATION TELS WO 2-4155WASHINGTON,D.C. 20546 WO 3-695FOR RELEASE: IMIEDIATEJanuary 22, 1969

RELEASE NO: 69-14A

CORRECTION TO ISIS-A PRESS KIT

Paragraph 2, flrst page of Press Kit, ISIS-A(NASA Release 69-14) should be corrected to read as follows:

ISIS-A (International Satellite for IonosphericStudies) is the third Canadian ionespheric satellite tobe launched in a cooperative Canadian-U.S. effort. Itwill continue, etc.

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isis-a press kit

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