MIDC/Data Quality Statements
Total Records: 13, displaying 1-13

R#SiteSerial NumberMeasurementStart DateStart TimeEnd DateEnd TimeData Quality Statement
1BMSPRS102Global 1-Axis LI-180005/08/201713:30:0005/12/201708:10:00The diffuser/dome on the LI-1800 was bashed in by heavy hail. Instrument has been removed from service until it can be replaced/repaired. The diffuser was repaired by pushing the dome back up from the opposite side, although it does not look perfect, the cosine response of this diffuser is not very good anyway.
2BMSPRS102Global 1-Axis LI-180004/22/201700:00:00Instrument is reading low below 560nm. There happens to be a filter change at 560nm so their may be filter degradation or contamination.
3BMSPRS102Global 1-Axis LI-180006/27/201615:00:00Because of the hot summer, the temperature controller output is now controlled by the data logger. When the system tries to switch to "cooling mode" the TEC is turned off and the detector temperature will begin to follow the internal instrument case temperature. When temperature drops below 40 C, then the TEC is turned back on by the data logger. The reason for this approach is because the system is not designed to expel heat. Additional uncertainty should be added to spectral data above 950nm due to temperatures above 40 C. See SRRL Ancillary data for detector temperature: http://midcdmz.nrel.gov/srrl_aux/
4BMSPRS102Global 1-Axis LI-180006/17/201613:10:0006/20/201608:00:00Due to a rapid detector overheat on 6/17/2016 (cause unknown at this time), the LFI-3525 temperature controller had automatically shutdown due to over-temperature (approaching 50C). Data above 950nm should not be used during this time frame.
5BMSPRS102Global 1-Axis LI-180002/03/201607:10:0002/03/201609:20:00Due to extreme cold outdoor wind chill temperature, the LFI-3525 temperature controller was at its current limit and LI-1800 detector temperature dropped to 37C. Data above 950nm should not be used during this time frame.
6BMSPRS102Global 1-Axis LI-180001/07/201600:00:0001/07/201614:45:00The EKO tracker for the LI-1800 has failed and is pointed in a 90-South orientation, data should not be used during this time frame.
7BMSPRS102Global 1-Axis LI-180012/31/201507:25:0012/31/201508:30:00Due to extreme cold outdoor temperature, the LFI-3525 temperature controller was at its current limit and LI-1800 detector temperature dropped to 38C. Data above 950nm should not be used during this time frame.
8BMSPRS102Global 1-Axis LI-180012/27/201509:35:0012/28/201508:50:00There was a power dip at SRRL that caused the LI-1800 temperature controller to return to its power on state (output to TEC off). Output was turned back on the following day. Data above 950nm should not be used during this time frame.
9BMSPRS102Global 1-Axis LI-180012/01/201500:00:0012/01/201523:59:00The LI-1800 temperature controller was being installed and troubleshot. Data above 950nm should not be used on this day.
10BMSPRS456Global Horizontal LI-180001/11/200800:00:0001/30/200813:10:00The Global LI-1800 data collection was down due to two broken pins in the RS-232 connector. The two pins were fixed on Jan 30 at 13:12 MST.
11BMSPRS456Global Horizontal LI-180012/15/200700:00:0001/05/200823:59:00The Global LI-1800 has an intermittent problem with the RS-232 communication cable or connector. Data availability during this time frame is sparse on non existent. No repairs have been at the time of this entry.
12BMSPRS456Global 40-South LI-180007/27/200100:00:0010/10/200113:43:00The Global 40-South LI-1800 is not functioning correctly. The spectra have been very strange since July 27. The unit was removed from service Sept 12 @ 7:49 MST. The unit was returned to service on Oct 10. No problem was found. All data during this time is bad and may be removed in the near future.
13BMSPRS456Global 40-South LI-180001/24/200111:02:0001/31/200115:47:00The Global 40-South spectroradiometer is mounted temporary above the cement pad at SRRL (about 5 ft above ground). This temporary mount was put at 50 degrees by mistake. It was moved to it's final location next to the PV panel's (which overlooks more vegetation) on 1/31/2001 at a 40 degree tilt.