D Q R Report

Start Date	Start Time	End Date	End Time
11/05/2001	1600	11/05/2001	1901
11/11/2001	1430	11/11/2001	1531
09/28/2001	1830	09/28/2001	1831
12/22/2001	1100	12/22/2001	1331
12/06/2001	1715	12/06/2001	2331
10/16/2001	1915	10/16/2001	2001
06/22/2001	1100	06/22/2001	1331
07/21/2001	1730	07/21/2001	1801
07/12/2001	1115	07/12/2001	1531
12/22/2001	0800	12/22/2001	1001
11/01/2001	0115	11/01/2001	0131
07/04/2001	1130	07/05/2001	0231
06/22/2001	1445	06/22/2001	1501
07/12/2001	0500	07/12/2001	0531
12/27/2001	2030	12/28/2001	0031
01/08/2002	1615	01/08/2002	2101
12/28/2001	1830	12/28/2001	1931
12/28/2001	2345	12/29/2001	0031
09/28/2001	1930	09/29/2001	0001
07/18/2001	0230	07/18/2001	0301
08/04/2001	1715	08/04/2001	1831
01/07/2002	0930	01/07/2002	1031
07/20/2001	1445	07/20/2001	1931
07/14/2001	0230	07/14/2001	1501
07/19/2001	1045	07/19/2001	1431
07/19/2001	0200	07/19/2001	0301
10/20/2001	1545	10/20/2001	1631
07/18/2001	0815	07/18/2001	0901
12/22/2001	0115	12/22/2001	0401
01/11/2002	1530	01/11/2002	1831
01/11/2002	0115	01/11/2002	0201
07/19/2001	0545	07/19/2001	0801
10/31/2001	1415	10/31/2001	1731
06/26/2001	0845	06/27/2001	0331
07/12/2001	0300	07/12/2001	0401
11/11/2001	1015	11/11/2001	1201
07/19/2001	0900	07/19/2001	0931
06/27/2001	0545	06/30/2001	1701
12/21/2001	2000	12/21/2001	2031
12/17/2001	1345	12/17/2001	1531
08/03/2001	1500	08/04/2001	0101
10/16/2001	2315	10/17/2001	0001
11/10/2001	1730	11/10/2001	1901
11/02/2001	1530	11/02/2001	1731
12/27/2001	1800	12/27/2001	1901
01/05/2002	1730	01/05/2002	2301

Soil Temperature #2 was intermittently incorrect. The cause is unknown. The indicated measurements that are calculated using soil temperature are also incorrect. Soil moisture #2 (30 minute only) was also affected because version 6 of the EBBR datalogger program uses a multiplication of soil temperature and soil moisture as part of the adjustment of soil moisture for soil temperature. This was discovered to be a poor technique soon after it was implemented, but E2 will continue to use version 6 until a replacement EBBR unit is available. When soil temperature #2 is large negative, soil moisture #2 is often twice as large as it should be. EBBR unit changeout dates are listed on the EBBR instrument web page.

Recalculate the average soil heat flow (ave_shf), latent heat flux (e), and sensible heat flux (h) using only soil sets 1, 3, 4, and 5, as follows: ave_shf = (g1 + g3 + g4 + g5)/4 e = -(q + ave_shf)/(1 + Bowen) h = -(q + e + ave_shf) where q is net radiation and Bowen is the Bowen ratio.

Subject:	SGP/EBBR/E2 - Reprocess: E2 EBBR Soil Temperature #2 Incorrect
DataStreams:	sgp30ebbrE2.b1, sgp15ebbrE2.b1
Description:	Soil Temperature #2 was intermittently incorrect. The cause is unknown. The indicated measurements that are calculated using soil temperature are also incorrect. Soil moisture #2 (30 minute only) was also affected because version 6 of the EBBR datalogger program uses a multiplication of soil temperature and soil moisture as part of the adjustment of soil moisture for soil temperature. This was discovered to be a poor technique soon after it was implemented, but E2 will continue to use version 6 until a replacement EBBR unit is available. When soil temperature #2 is large negative, soil moisture #2 is often twice as large as it should be. EBBR unit changeout dates are listed on the EBBR instrument web page.
Suggestions:	Recalculate the average soil heat flow (ave_shf), latent heat flux (e), and sensible heat flux (h) using only soil sets 1, 3, 4, and 5, as follows: ave_shf = (g1 + g3 + g4 + g5)/4 e = -(q + ave_shf)/(1 + Bowen) h = -(q + e + ave_shf) where q is net radiation and Bowen is the Bowen ratio.
Measurements:	sgp30ebbrE2.b1: Soil moisture 2, gravimetric(soil_moisture_2) Surface soil heat flux 2(surface_soil_heat_flux_2) Change in energy storage 2, 0-5 cm soil layer(energy_storage_change_2) Soil temperature 2(soil_temp_2) Surface latent heat flux(latent_heat_flux) Surface soil heat flux, average of fluxes 1-5(surface_soil_heat_flux_avg) Surface sensible heat flux(sensible_heat_flux) more sgp15ebbrE2.b1: Soil temperature 2 (resistance ratio)(soil_temp_2_rr) more