Statements (17)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
scientific instrument
|
| gptkbp:component |
geodetic observatories
|
| gptkbp:developedBy |
early 20th century
|
| gptkbp:directionA |
fixed vertically
|
| gptkbp:enables |
precise latitude determination
|
| https://www.w3.org/2000/01/rdf-schema#label |
photographic zenith tube
|
| gptkbp:measures |
zenith distances of stars
|
| gptkbp:recordedAt |
star transits near zenith
|
| gptkbp:replacedBy |
gptkb:visual_zenith_telescope
|
| gptkbp:usedBy |
astronomer
geodesists |
| gptkbp:usedFor |
astronomical observations
determining vertical deflection measuring latitude |
| gptkbp:uses |
photographic plates
|
| gptkbp:bfsParent |
gptkb:Airy_Transit_Circle
|
| gptkbp:bfsLayer |
5
|