Time of firing: 1009 MST
    Agency: Air Research and Development Command
    Altitude: 84.8 miles

UPPER AIR INSTRUMENTS

    Soft solar x-ray studies: Packets, each containing photographic film covered with
        an opaque evaporated aluminum film, were placed on surface of warhead
        (AFCRC)
    Skin and boundary layer temperature experiment: Nickel temperature-sensitive
        elements, commutated in one arm of ac resistance bridge, to sense heat change
        in flush-mounted thin steel diaphragms distributed along rocket skin (Boston U.)
    Oblique incidence ionosphere propagation experiment: Gound-trnsmitted signal
        travels over very long path. Receivers both in rocket and on ground. Rocket
        transmitter retransmits signal received in rocket to ground receiver. Meas-
        ures attenuation of wave passing downward through E layer reflected from F
        layer. (Boston U.)
    Acoustical studies: Three systems of microphones and associated amplifiers set
        directly into shell of nose cone (Temple U.)
    Sky brightness studies: Six multiplier phototubes, with associated filters, were
        located in instrument compartment (AFCRC)
    Data recording by photo technique: Six cameras - one B-2, 16-mm (motion picture)
        in parachute section, one Bell and Howell, 16-mm (motion picture) in instrument
        section, two robot (still pictures) cameras in instrument section, and two
        modified GSAP cameras in mid-body (AFCRC)
    Ballistic research laboratory test oscillator biological experiment: Project MX 1450
        (WPAFB)
    Cannonball experiment: Gyro-stabilized sphere having temperature insulated zones
        and containing 14 thermocouples, time and temperature recording devices,
        gyroscope, and breakup and recovery means. (Armour Research Foundation of
        Illinois Institute of Tech.)

DATA RECOVERY INSTRUMENTS

    Telemeter: NRL 30-channel system. AFCRC beacon used to telemeter multiplexed
        information from experiments.
    Airborne recorder: Film recording galvanometer for Project Cannonball
    Physical recovery: Warhead separation to be effected at peak altitude by radio com-
        mand to ARW-37 cutoff receiver
            Blossom IV-G Fifth of series of rockets carrying elongated Blossom nose
        section. Instrument compartment made of two hard wooden sections; nose cone
        was an aluminum shell with a probe antenna, four telemetering blade antennas,
        and an insulator mounted on its tip. Blossom nose section was to be separated
        from main body by means of four pistons actuated by explosive charge.
            Parachute recovery - Main parachute canopy, 64 ft in diameter, and 16 ft-
        diameter ribbon drag parachute for lowering of warhead

BALLISTIC INSTRUMENTS

    Firing Range
        Theodolites: Three Mitchell and seven Askania stations
        Cameras: Three ballistic and three Bowen-Knapp stations
        Telescopes: Four stations
        Radar: Two S-band radars
        Impact location: Radar impact predictor

    Airborne
        Beacon: Radar beacon, APN-55, S-band
        Radio Cutoff: ARW-37 cutoff receiver

ROCKET INFORMATION

    Unfueled rocket weight: 10,683 lb
    Unfueled rocket C.G.: 272.8 in.
    Gross weight at takeoff: 30,178 lb

ROCKET PERFORMANCE

    Firing angle: 0.0 degrees
    Program angle: Seven degrees from vertical
    Time to burnout: 64.8 sec
    Altitude at burnout: 20.5 miles
    Time to zenith: 214.5 sec
    Altitude at zenith: 84.8 miles
    Time to tail blowoff: 221.0 sec
    Altitude at tail blowoff: 84.7 miles
    Flight duration: 373 sec
    Impact coordinates: 36.1 mi. at azimuth of 357 degrees from blockhouse

BALLISTIC DATA

    Theodolites: Mitchell data to about 75 sec, Askania data until separation
    Cameras: Ballistic - records to burnout, Good Bowen-Knapp records
    Radar: Good signal received throughout flight until 373 sec
    Impact location: One tracker followed missile nearly until peak

DATA RECOVERY

    Physical recovery: Warhead separation occurred at zenith.
            Main parachute failed to support load of the warhead. Parachute, upon
        recovery, gave evidence of severe damage due to high temperature.
            Film from cameras in both the mid-body and warhead were recovered.
        Mid-body cameras showed warhead separation.
            All soft x-ray packets were recovered from warhead at impact site.
            Cannonball recovered.
            Film casette for Project MX 1450 recovered.
    Airborne recorder: Film recorder from Project Cannonball recovered in excellent
        condition

EXPERIMENTAL DATA

    Cannonball experiment: No data obtained; outer protective cover failed to separate.
        All other phases of equipment worked well, i.e., Cannonball ejection from war-
        head and ejection and recovery of data recorder.
    Skin and boundary later temperature experiment: Curves of temperature vs time
        for heating effects due to frictional dissipation between various points on the
        missile and adjacent air molecules were obtained for rocket fins only.
    Oblique incidence ionosphere propagation experiment: Excellent data. Firing
        occurred during ionospheric storm. Very-long-path propagation data show radio
        wave being "ducted" or trapped between ionospheric layers. Ion density meas-
        ures obtained through the tabulation of absorption value of signal as it passes
        through the layer.
    Acousitcal studies: Noise levels lower than anticipated; meteoric impacts less
        intense than in V-2 No. 31.
    Sky brightness studies: Intensity of sky light measured from ground to 135 km
        through two interference filters peaked at 4278 A and 5590 A. Values from
        ground to 35 km consistent with previous measurements of intensity vs altitude;
        from 35 to 135 km a relatively large and constant amount of light (approxi-
        mately 1% of ground value) was obtained.
    Soft x-ray studies: Eleven packets in experiment. Six damaged, yielding no useful
        information. Darkening of film in remaining five packets definitely verified
        presence of soft x-rays and approximately confirms order of magnitude of
        predicted intensity (10^8 quanta/cm in 8-12 A range).

COMMENTS

    Rocket modifications: Nose section differed from previously launched rockets of
        Blossom series in that it was an aluminum shell with a probe antenna, four
        telemetering blade antennas, and an insulator mounted on its tip; instrument
        compartment was composed of two hardwood section with aluminum access
        doors
    Rocket performance: Preliminary stage, takeoff, and flight appeared good;
        propulsion performance ws near optimum, and steering was good. Missile
        disintegration occurred on the downleg at an altitude of 11.5 miles.

REPORTS AND PAPERS

    "Day Sky Brightness Measured by Rocketborne Photoelectric Photometers," H. A.
        Miley et al., Trans. Am. Geophys. Union (in press)