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The First 100 Years
:: The National Time Service and Ionospheric Pre…
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Title:
The National Time Service and Ionospheric Prediction Service
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NOTE: All images are copyright and must not be reproduced or mirrored in any form without written permission.
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The National Time Service and Ionospheric Prediction Service
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Clare Wehner at Transit telescope, 1954
Views: 3364
Wehner
Views: 4516
PZT
Views: 4416
Inside the PZT
Views: 4382
Removing the PZT
Views: 4375
Removing the PZT
Views: 4328
Removing the PZT
Views: 4283
Removing the PZT
Views: 3840
Removing the PZT
Views: 3841
