Time of firing: 1103 MST
    Agency: Applied Physics Laboratory, Johns Hopkins University
    Altitude: 54.0 miles

UPPER AIR INSTRUMENTS

    Density-pressure-temperature: Pirani cone temperature probe (Signal Corps,
        Mich. U.)
    Cosmic radiation: Four arrays of 3 Geiger tubes each surrounded by various
        thicknesses of lead. One array in nose extension (APL).
    Composition: Two air-sampling bottles with associated opening and sealing devices
        (Signal Corps-Mich. U.)
    Other: Skin temperature-sensitive paint on warhead. (Southern Research Institute.)

ROCKET PERFORMANCE INSTRUMENTS

    High altitude photography (APL). Modified K-25 camera loaded with Super XX film.

DATA RECOVERY INSTRUMENTS

    Telemeter: NRL PXTA-501 23-channel PPM-AM system
    Physical recovery: Warhead blowoff by radio command. Explosives in control
        chamber to separate forward portion of rocket.

BALLISTIC INSTRUMENTS

    Firing Range
        Theodolites: Two Mitchell and five Askania stations
        Cameras: Two ballistic and three Bowen-Knapp stations
        Telescopes: Four stations
        Radar: Two modified SCR-584 S-Band stations
        Doppler: Four stations

    Airborne
        Beacon: APN-55 S-band transponder
        Doppler: Dovap transceiver
        Radio Cutoff: AN/ARW-17 FM control receiver for command fuel cutoff and
            blowoff
        Aspect: Three Gianinni heliographs. Four arrays of photocells.
        Other: Routine propulsion and control performance instruments

ROCKET INFORMATION

    Unfueled rocket weight: 9942 lb
    Gross weight at takeoff: 29,510 lb

ROCKET PERFORMANCE

    Program angle: Seven degrees
    Time to burnout: 61.5 sec
    Velocity at burnout: 3874 ft/sec
    Altitude at burnout: 18.7 miles
    Time to zenith: 180.5 sec
    Altitude to zenith: 60.0 miles
    Time to tail blowoff: 295 sec
    Altitude to tail blowoff: 21 miles
    Flight duration: 521 sec
    Impact Coordinates: 21 mi. north, 2 mi east

BALLISTIC DATA

    Theodolites: Askania - good record through burning almost to peak
    Cameras: Ballistic and Bowen-Knapp - satisfactory operations.
    Telescopes: Good data for complete flight
    Radar: Fair trajectory data from 0 to 170 sec, no record from 170 to 390 sec
    Doppler: Position and velocity data from 0 to 295 sec

DATA RECOVERY

    Physical recovery: Camera, heliographs and air-sample bottles recovered. War-
        head with temperature-sensitive paint samples not recovered

COMMENTS

    Rocket performance: Premature fuel cutoff at 61 sec by turbine overspeed. Roll
        rate 2 rpm beginning at 70 sec.

REPORTS AND PAPERS

    "Preliminary Report on High Altitude Photography," Clyde T. Holliday, Photographic
        Engineering 1:16 (1950)
    "Seeing the Earth From 80 Miles Up," Clyde T. Holliday, National Geographic
        Magazine XCVIII:511 (1950)
    "Transition Effects of the Primary Cosmic Radiation in Lead, Aluminum and in the
        Atmosphere," J. A. Van Allen, proceedings of the Echo Lake Cosmic Ray
        Symposium June 23-28, 1949, Published by the Office of Naval Research,
        November 1949, pp. 95-102
    "Photographic Determination of the Orientation of a Rocket," L. W. Fraser and R. S.
        Ostrander, Photographic Engineering 1 (No. 1):105 (1950)