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The Hello and welcome. This is Michael Annisas and you're listening to Episode 295 of the Space Rocket History podcast.

And now, Space 1970.

Osumi from Japan and Uhuru from the United States.

In this episode, we will cover two more significant unmanned spaceflight

that began in 1970.

We will begin with the first Japanese satellite.

Osumi is the name of the first Japanese satellite placed into orbit.

It was named after the Osumi province in the southern islands of Japan.

Interestingly enough, Osumi was actually a series of five small satellites built to become

the first Japanese satellite in orbit. I will explain that a little later,

but first I want to describe the Assumi satellite. The satellite was a small observatory,

carrying five experiments designed to make ionospheric observations of temperature, density, measurement of solar emission, and measurement

of energetic particles. The satellite was built by the Japanese Institute of Space and Astronautical

Science. The satellite consisted of a small instrument package attached to the fourth stage of the L4S launch vehicle.

Essentially, Osumi was a 48 centimeter diameter spherical rocket engine with an instrumentation package on top.

To me, the physical appearance of the satellite resembled a very large bowling ball

with a cylindrical instrument compartment on top and a small rocket bell on the bottom.

The satellite was equipped with two hook antennas and four beryllium copper whip type antennas.

The instrumentation compartment included a telemetry transmitter, a beacon transmitter, a pilot transmitter, a precision accelerometer, and a strain gauge type thermometer.

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