An instrument to monitor the tilt of large structures
Abstract
The long-term or short-term tilt of structures such as locks or dams may be measured with an automatic level that has been temporarily modified for the purpose. The modifications consist of the addition of an autocollimating eyepiece and an optical vernier. A calibration mirror is also required for the measurement of long-term tilt. Accuracies of 1 to 5 seconds of tilt may be obtained.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- April 1983
- Bibcode:
- 1983STIN...8410544R
- Keywords:
-
- Attitude (Inclination);
- Dams;
- Optical Equipment;
- Calibrating;
- Canals;
- Gates (Openings);
- Mirrors;
- Monitors;
- Instrumentation and Photography