Sold out

Explorer 7 Satellite Telemetry Data Tape

PRODUCT TYPE: Historic Artifacts

This strip of magnetic tape includes a portion of raw telemetry data for the Explorer 7 satellite. This listing is for a section of tape in an acrylic case that was taken from a larger spool recorded in October 1959.

In 1955, even before any artificial satellites had been launched, planning for a satellite-tracking network was already underway at NASA.

Two years later, the Minitrack network of 11 stations positioned around the globe was completed just 3 days before the launch of Sputnik 1.

As satellites populated the skies, interferometers recorded their positions and velocities at each of these stations. This section of tape is from the Minitrack station in Johannesburg, South Africa.

One of the early satellites tracked by this network was Explorer 7 (aka Iota 59), which was launched in 1959 and collected scientific data about Earth’s atmosphere for 2 years before losing communication. 

Among the most notable data it collected was the first satellite measurements of the heat balance of Earth’s atmosphere, initiating NASA’s mission of collecting valuable climate data just a year after the agency was formed.


Explorer 7 remains in orbit to this day. Track the satellite's current position in the tab below.

This item was featured in a recent Matter box


Pickup currently unavailable at our Tulsa Storefront

Explorer 7 Satellite Telemetry Data Tape

Default Title

Track the Satellite
full recording
Track the Satellite
full recording

Download the track (mp3 format, 47 MB)


Customer Reviews

Based on 15 reviews
R.P. (Virginia, United States)

Ray gave this item 5 stars

J.G. (Virginia, United States)

awesome gift for phd advisor

S.B. (Virginia, United States)

Sarah gave this item 5 stars

B.K. (Virginia, United States)

Really cool item for NASA/space lovers. Item came packaged with care. Would strongly recommend!


Exactly as pictured.
Such a cool thing to own. I have to wonder about everything the probe has seen as I hold this bit of history in my hand.
Packaged top survive a trip on any airline and arrived promptly.
Highly recommend this seller.

F.D. (Virginia, United States)

Arrived quickly and was exactly as described!

A.A. (Virginia, United States)

Ashley rated this 5 stars on Etsy

V.M. (Virginia, United States)

Victoria rated this 5 stars on Etsy

M.O. (Virginia, United States)

I got this for my husband for Father's Day. He was so surprised and thrilled to have a piece of nasa history

K. (Virginia, United States)

Jacob rated this 5 stars on Etsy

Authenticity Guaranteed

Everything we sell is verified authentic. We only deal with the most reputable collectors, and consult with our trusted network of scientists and experts.

Free Shipping

All orders of $50 or more qualify for free shipping in the US.

Easy Payments

We accept most cards, PayPal, After Pay, Apple/Google/Meta Pay, and crypto.

Simple Returns

Change your mind? No problem. Enjoy easy returns within 30 days.

Free Stickers

We toss a random science sticker in every online order

We use cookies to help people find our small business and have an enjoyable shopping experience.

Explorer 7 Satellite Telemetry Data Tape

Explorer 7 Satellite Telemetry Data Tape