| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D060718.4 | TWP/TSI/C1 - Shadowband continuosly rotating | twptsiC1.00, twptsicldmaskC1.a1, twptsimovieC1.a1, twptsiskycoverC1.b1, twptsiskyimageC1.a1 |
| D060822.1 | TWP/TSI/C1 - rust spots on mirror | twptsicldmaskC1.a1, twptsiskycoverC1.b1 |
| D060825.2 | TWP/TSI/C1 - high control board temperature | twptsiskycoverC1.b1 |
| D060915.2 | TWP/TSI/C1 - solar shadowband inoperative | twptsicldmaskC1.a1, twptsimovieC1.a1, twptsiskycoverC1.b1, twptsiskyimageC1.a1 |
| D070203.3 | TWP/TSI/C2 - hazy image | twptsicldmaskC2.a1, twptsimovieC2.a1, twptsiskycoverC2.b1, twptsiskyimageC2.a1 |
| D070406.8 | TWP/TSI/C1 - hazy image | twptsicldmaskC1.a1, twptsimovieC1.a1, twptsiskycoverC1.b1, twptsiskyimageC1.a1 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/18/2006 | 2000 | 07/25/2006 | 0350 |
| Subject: | TWP/TSI/C1 - Shadowband continuosly rotating |
| DataStreams: | twptsiC1.00, twptsicldmaskC1.a1, twptsimovieC1.a1, twptsiskycoverC1.b1, twptsiskyimageC1.a1 |
| Description: | The mirror was continuously spinning during different periods of the day, usually in the afternoon, causing the shadowband to not properly block the sun. This problem was corrected by removing the real-time-clock integrated circuit DSI306, or EEPROM U10, from the control board and reloading the position and time parameters. |
| Measurements: | twptsiC1.00:
twptsicldmaskC1.a1:
twptsimovieC1.a1:
twptsiskyimageC1.a1:
twptsiskycoverC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/09/2006 | 0000 | 10/12/2006 | 0600 |
| Subject: | TWP/TSI/C1 - rust spots on mirror |
| DataStreams: | twptsicldmaskC1.a1, twptsiskycoverC1.b1 |
| Description: | During the evening of 7/8/2006, something caused several rust spots on one side of the hemispheric mirror which continued to grow in size and to be interpreted as clouds in the processed images. This problem was corrected during a site visit when the mirror was replaced. |
| Measurements: | twptsicldmaskC1.a1:
twptsiskycoverC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/13/2005 | 0000 | 10/12/2006 | 2300 |
| Subject: | TWP/TSI/C1 - high control board temperature |
| DataStreams: | twptsiskycoverC1.b1 |
| Description: | The TT8 control board temperature was high, ~50C, so that the cooling fan was constantly on. It appears that the heat sinks were not transferred from the original board to the new one when it was replaced. The problem was corrected when heat sinks were installed. |
| Measurements: | twptsiskycoverC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 08/29/2006 | 1900 | 01/30/2007 | 0010 |
| Subject: | TWP/TSI/C1 - solar shadowband inoperative |
| DataStreams: | twptsicldmaskC1.a1, twptsimovieC1.a1, twptsiskycoverC1.b1, 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. |
| Measurements: | twptsicldmaskC1.a1:
twptsimovieC1.a1:
twptsiskyimageC1.a1:
twptsiskycoverC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/11/2007 | 1900 | 02/13/2007 | 0447 |
| Subject: | TWP/TSI/C2 - hazy image |
| DataStreams: | twptsicldmaskC2.a1, twptsimovieC2.a1, twptsiskycoverC2.b1, twptsiskyimageC2.a1 |
| Description: | Condensation in the camera lens and/or filter caused the sky images to be "hazy". The desiccant in the main enclosure was changed and the neutral density filter was cleaned. |
| Measurements: | twptsicldmaskC2.a1:
twptsiskycoverC2.b1:
twptsiskyimageC2.a1:
twptsimovieC2.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/30/2007 | 0011 | 02/01/2007 | 0035 |
| Subject: | TWP/TSI/C1 - hazy image |
| DataStreams: | twptsicldmaskC1.a1, twptsimovieC1.a1, twptsiskycoverC1.b1, twptsiskyimageC1.a1 |
| Description: | When the TSI from Darwin was installed (so the instrument from Manus could be returned to Darwin for repair) moisture in the camera lens and filter caused the sky image to be very "hazy". The U10 chip was removed from the control board, desiccant was installed inside the enclosure, additional small desiccant bags were installed inside the camera housing, the camera housing was sealed with silicon to prevent moisture ingress, and the camera lens filter was cleaned and the focus adjusted. |
| Measurements: | twptsicldmaskC1.a1:
twptsimovieC1.a1:
twptsiskyimageC1.a1:
twptsiskycoverC1.b1:
|