| R# | Site | Serial Number | Measurement | Start Date | Start Time | End Date | End Time | Data Quality Statement |
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| 1 | BMS | | Snow Depth | 03/16/2021 | 00:00:00 | 04/12/2021 | 12:00:00 | The SRRL BMS ultrasonic sensor (for snow depth) is producing intermittent readings due to near end of life for the transducer. As required by the maintenance schedule (replace every 3 years), the transducer (part no 19486) was replaced on 4/12/2021. |
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| 2 | BMS | | Snow Depth | 12/06/2016 | 00:00:00 | 01/13/2017 | 16:00:00 | The SRRL BMS ultrasonic sensor (for snow depth) is no longer operational because the transducer failed. As required by the maintenance schedule (replace every 3 years), the transducer (part no 19486) was replaced on 1/13/2017. |
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| 3 | BMS | | Snow Depth | 09/20/2011 | 08:00:00 | 11/04/2011 | 13:00:00 | The SRRL BMS ultrasonic quality indicator (for snow depth) was indicating high measurement uncertainty for for the past few days, sometimes resulting in missing snow depth values. As required by the maintenance schedule (replace every 3 years), the transducer (part no 19486) was replaced on 11/8/2011 at 11:43 MST, which will hopefully correct the problem. The replacement kit also included new desiccant. |
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| 4 | BMS | | Snow Depth | 06/28/2011 | 12:36:00 | 07/05/2011 | 12:37:00 | Construction workers piled dirt under the SRRL BMS snow depth sensor on June 28 at 12:36 MST, which is causing bogus snow depth readings of up to 8 inches. Dirt was removed on July 5 at 12:37 MST. Snow depth data was later repaired on July 6 by resetting the values to zero. |
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| 5 | BMS | | Snow Depth | 12/09/2009 | 10:52:00 | 12/09/2009 | 14:22:00 | Due to a power outage (and bad power) at NREL, the following BMS instruments were down: TSP-1, TSP-700, UVSAT, UVSBT, CUVA1, CUVA2, CUVB1, CUVB2, UVB-1, 501A, MS-210W, SPN1, Snow Depth, TSI-880, POM-01. |
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| 6 | BMS | | Snow Depth | 11/15/2008 | 07:45:00 | 11/15/2008 | 14:29:00 | Due to a planned power outage at SRRL, the following BMS instruments were down: TSP-1, TSP-700, UVSAT, UVSBT, CUVA1, CUVA2, CUVB1, CUVB2, UVB-1, 501A, MS210, SPN1, Snow Depth, TSI-880, SkyCam. |
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