Time of firing: 1443 MST
    Agency: Air Research and Development Command
    Altitude: 18,900 ft

UPPER AIR INSTRUMENTS

    The solar constant: Determination of intensity of solar radiation at the limit of the
        atmosphere by use of semi-conductor flake bolometers exposed to the radiation
        (R. I. State)
    Ultraviolet radiation from the sun: A coronagraph spectrograph positioned in the
        direction of the sun by a biaxial pointing control (U. of Colorado)
    Solar soft x-ray studies: Packets with photographic x-ray film protected by opaque
        filters of aluminum were exposed on surface of the rocket (AFCRC)
    Vertical incidence ionosphere experiment: Synchronized ground and airborne equip-
        ment to measure delay time of low-frequency pulse traveling through the E layer
        by comparison with travel time of undelayed high-frequency signal (AFCRC and
        U. of Utah)
    Photographic studies: Four cameras in instrument section - one modified Cineflex
        35-mm motion picture camera, two modified 16-mm motion picture cameras,
        and one modified 16-mm high speed camera (AFCRC)
    Ultraviolet characteristics of the upper atmosphere: One F/1.5 modified Maksutov-
        Bouwers type spectrograph (U. of Denver)
    Sky infrared measurements: Photocell (type CE-25VA/B) for measurement of sky
        infrared intensities (AFCRC)
    Sky brightness experiment: Monochromatic photometers mounted on two access
        doors located 180 degrees apart to measure scattered light and day airglow
        (AFCRC)
    Biological experiment: Project MX-1450 (Aero-Medical Lab., WPAFB)

DATA RECOVERY INSTRUMENTS

    Telemeter: NRL telemetering system
    Airborne recorder: Tufts College proportional data recorder - used to supplement
        normal telemetering facilities; data recorded on 16-mm film
    Physical recovery:
            Parachute studies - Eight ft ribbon chute to recover Aerobee nose section
    (see "Rocket Modifications") (Equip. Lab., WPAFB)
        Blossom IV-F - standard Blossom nose cone modified as in "Rocket
    Modifications" to be blown off as Aerobee nose cone is ejected (Ludwig Honold
    Mfg. Co.)
        Aerobee nose cone was to be ejected at approximately 50 miles altitude on
    downleg of trajectory. Approximately 10-20 sec later remainder of instrument
    section was to be separated from main body by TNT charges and fall free with
    no attempt at parachute recovery.

BALLISTIC INSTRUMENTS

    Firing Range
        Theodolites: Four Mitchell and eight Askania stations
        Cameras: Three Bowen-Knapp stations
        Telescopes: Five stations
        Radar: Two S-band stations
        Impact location: Impact point computer

    Airborne
        Beacon: 470-493.5 Mc beacon to provide trajectory information and information
            on delay of a 4.45-Mc ground transmitted pulse (AFCRC)
        Radio Cutoff: ARW-37

ROCKET INFORMATION

    Unfueled rocket weight: 9781 lb
    Unfueled rocket C.G.: 266.1 in. from venturi exit
    Gross weight at takeoff: 29,431 lb

ROCKET PERFORMANCE

    Program angle: Seven degrees from vertical
    Time to zenith: 47 sec.
    Altitude to zenith: 18,900 ft
    Flight duration: 89.0 sec to warhead impact, 100.0 sec to tail section impact
    Impact coordinates: Main body - 0.7 mi. at azimuth of 56 degrees 52 ft 18 in.,
        warhead - 0.6 mi. at azimuth of 59 degrees 2 ft 52 in.

BALLISTIC DATA

    Theodolites: Askania and Mitchell had images until impact
    Cameras: Bowen-Knapp had image until 16.9 sec
    Telescopes: Until impact
    Radar: Good beacon signal received until 7.9 sec; beacon did not operate after that
        time
    Impact location: Two trackers followed missile until impact
    Other: Impact computer - C and E station trackers followed to impact

DATA RECOVERY

    Telemeter: Telemetering signals solid until 47.2 sec
    Physical recovery: Instrumentation destroyed upon impact with exception of four
        cameras installed for photo studies
    Airborne recorder: No recovery, due to nature of impact

EXPERIMENTAL DATA

    Due to nature of the flight, no data were obtained from the upper air instrumentation
        flown in this rocket

COMMENTS

    Rocket modifications: Instrumentation for the solar radiation experiment and the
        ultraviolet radiation experiment was housed in an Aerobee nose section faired
        into the Blossom nose section. Instruments for both experiments were con-
        tained in a single housing which was to have been pointed at the sun by the
        University of Colorado biaxial point control. This Aerobee nose extended
        43 in. beyond Station zero of standard Blossom IV.
    Rocket performance: The abnormally short flight was due to an explosion in tail
        section shortly after X time. At this time (approximately eight sec) several
        pieces of the tail were blown off. Thrust continued and steering was satsfac-
        tory, but, with loss of portions of the tail section, cutoff was called for at
        approximately 22 sec.