Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
08/29/2006 | 1900 | 01/30/2007 | 0010 | Incorrect |
Subject: | TWP/TSI/C1 - solar shadowband inoperative |
DataStreams: | twptsiskycoverC1.b1, twptsicldmaskC1.a1, twptsimovieC1.a1, twptsiskyimageC1.a1 |
Description: | The mirror/shadowband was not turning and there was no communication with the control board. The shadowband was stuck in the position of 0 degrees from 8/29 to 9/20/2006. On 10/12/2006, the mirror was replaced, the real-time clock chip was removed and heat sinks were added to the control board, and the Ethernet hub and serial adaptor were replaced. On 1/8/2007, the slip clutch assembly, timing pulley, and timing belt were replaced (which were damaged when the mirror was replaced). These actions did not correct the problem. The instrument was swapped with the unit from Darwin so that the control board could be repaired and tested in Darwin. Several images were collected in the iterim that should be ignored. These images include periods when the sun was not masked by the shadowband or the camera lens was covered by tape to protect the CCD from direct exposure to the sun. There are also extended periods of missing data when the instrument was shutdown, waiting for parts. |
Suggestions: | The data for only one sample per day, acquired at solar noon when the sun was at the same position as the shadowband, can be used. |
Measurements: | twptsiskycoverC1.b1: more
twptsiskyimageC1.a1: more twptsicldmaskC1.a1: more twptsimovieC1.a1: more |