| Description: | The E13 MFRSR developed a shading problem on or about 05/04. (The exact date when this
problem started is difficult to pin down exactly.) The shading problem is easy to identify
on a clear day because plots of direct beam and diffuse irradiance versus time become
"fuzzy". The total irradiance is not affected.
In response to the shading problem, a whole sequence of events then ensued: these actions
were designed to solve the shading problem but did not succeed until the very end.
Here's a rundown of what took place:
98/05/11 - shadowband adjustment was made at 1544 GMT
- this adjustment corrected the shading problem that
occurred in the morning, but inadvertently caused
a PM shading problem
98/05/20 - shadowband adjustment at 1804 GMT
98/05/21 - shadowband adjustment at 1630 GMT
98/06/01 - shadowband adjustment at 1910 GMT
98/06/02 - shadowband adjustmnet at 1550 GMT
Alas, these adjustments did not solve the shading problem and
it seemed to get worse (for example, on 06/11 the shading
is VERY BAD from sunup until about 1500 LST).
98/06/16 - shadowband adjustment at 1715 GMT
This final adjustment seems to a solved the problem! |
| Measurements: | sgpmfrsrE13.b1: - Narrowband Direct Horizontal Irradiance, Filter 5(direct_horizontal_narrowband_filter5)
- Narrowband Diffuse Hemispheric Irradiance, Filter 6(diffuse_hemisp_narrowband_filter6)
- Direct Normal Broadband Irradiance broadband scale applied(direct_normal_broadband)
- Narrowband Direct Horizontal Irradiance, Filter 6(direct_horizontal_narrowband_filter6)
- Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
- Narrowband Diffuse Hemispheric Irradiance, Filter 3(diffuse_hemisp_narrowband_filter3)
- Narrowband Diffuse Hemispheric Irradiance, Filter 4(diffuse_hemisp_narrowband_filter4)
- Narrowband Diffuse Hemispheric Irradiance, Filter 5(diffuse_hemisp_narrowband_filter5)
- Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)
- Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
- Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
- Narrowband Direct Horizontal Irradiance, Filter 3(direct_horizontal_narrowband_filter3)
- Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
- Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
- Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
- Narrowband Diffuse Hemispheric Irradiance, Filter 2(diffuse_hemisp_narrowband_filter2)
- Narrowband Direct Horizontal Irradiance, Filter 2(direct_horizontal_narrowband_filter2)
- Narrowband Diffuse Hemispheric Irradiance, Filter 1(diffuse_hemisp_narrowband_filter1)
- Narrowband Direct Horizontal Irradiance, Filter 4(direct_horizontal_narrowband_filter4)
- Narrowband Direct Horizontal Irradiance, Filter 1(direct_horizontal_narrowband_filter1)
- Direct Horizontal Broadband Irradiance, broadband scale applied(direct_horizontal_broadband)
sgpmfrsrE13.a0: - Direct Horizontal Broadband Irradiance, broadband scale applied(direct_horizontal_broadband)
- Narrowband Diffuse Hemispheric Irradiance, Filter 4(diffuse_hemisp_narrowband_filter4)
- Narrowband Diffuse Hemispheric Irradiance, Filter 5(diffuse_hemisp_narrowband_filter5)
- Narrowband Diffuse Hemispheric Irradiance, Filter 6(diffuse_hemisp_narrowband_filter6)
- Narrowband Direct Horizontal Irradiance, Filter 6(direct_horizontal_narrowband_filter6)
- Narrowband Direct Horizontal Irradiance, Filter 4(direct_horizontal_narrowband_filter4)
- Narrowband Direct Horizontal Irradiance, Filter 2(direct_horizontal_narrowband_filter2)
- Narrowband Direct Horizontal Irradiance, Filter 5(direct_horizontal_narrowband_filter5)
- Narrowband Diffuse Hemispheric Irradiance, Filter 3(diffuse_hemisp_narrowband_filter3)
- Narrowband Diffuse Hemispheric Irradiance, Filter 2(diffuse_hemisp_narrowband_filter2)
- Narrowband Direct Horizontal Irradiance, Filter 1(direct_horizontal_narrowband_filter1)
- Narrowband Diffuse Hemispheric Irradiance, Filter 1(diffuse_hemisp_narrowband_filter1)
- Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
- Narrowband Direct Horizontal Irradiance, Filter 3(direct_horizontal_narrowband_filter3)
sgpmfrsrlangplotE13.c1: - rejected points for the final fit for the Direct Narrowband Filter1, Michalsky(michalsky_rejected_filter1)
- rejected points for the final fit for the Direct Broadband, Barnard(barnard_rejected_broadband)
- log(irradiance) for the Direct Narrowband Filter6, Barnard(barnard_lnI_filter6)
- log(irradiance) for the Direct Broadband, Barnard(barnard_lnI_broadband)
- rejected points for the final fit for the Direct Narrowband Filter6, Barnard(barnard_rejected_filter6)
- log(irradiance) for the Direct Narrowband Filter2, Barnard(barnard_lnI_filter2)
- log(irradiance) for the Direct Narrowband Filter1, Michalsky(michalsky_lnI_filter1)
- log(irradiance) for the Direct Narrowband Filter3, Barnard(barnard_lnI_filter3)
- log(irradiance) for the Direct Narrowband Filter5, Barnard(barnard_lnI_filter5)
- log(irradiance) for the Direct Narrowband Filter3, Michalsky(michalsky_lnI_filter3)
- rejected points for the final fit for the Direct Narrowband Filter2, Barnard(barnard_rejected_filter2)
- log(irradiance) for the Direct Broadband, Michalsky(michalsky_lnI_broadband)
- log(irradiance) for the Direct Narrowband Filter4, Barnard(barnard_lnI_filter4)
- log(irradiance) for the Direct Narrowband Filter4, Michalsky(michalsky_lnI_filter4)
- log(irradiance) for the Direct Narrowband Filter6, Michalsky(michalsky_lnI_filter6)
- rejected points for the final fit for the Direct Narrowband Filter3, Barnard(barnard_rejected_filter3)
- rejected points for the final fit for the Direct Narrowband Filter4, Barnard(barnard_rejected_filter4)
- rejected points for the final fit for the Direct Narrowband Filter1, Barnard(barnard_rejected_filter1)
- log(irradiance) for the Direct Narrowband Filter2, Michalsky(michalsky_lnI_filter2)
- rejected points for the final fit for the Direct Narrowband Filter5, Michalsky(michalsky_rejected_filter5)
- log(irradiance) for the Direct Narrowband Filter1, Barnard(barnard_lnI_filter1)
- rejected points for the final fit for the Direct Narrowband Filter6, Michalsky(michalsky_rejected_filter6)
- rejected points for the final fit for the Direct Narrowband Filter5, Barnard(barnard_rejected_filter5)
- log(irradiance) for the Direct Narrowband Filter5, Michalsky(michalsky_lnI_filter5)
- rejected points for the final fit for the Direct Narrowband Filter2, Michalsky(michalsky_rejected_filter2)
- rejected points for the final fit for the Direct Narrowband Filter4, Michalsky(michalsky_rejected_filter4)
- rejected points for the final fit for the Direct Broadband, Michalsky(michalsky_rejected_broadband)
- rejected points for the final fit for the Direct Narrowband Filter3, Michalsky(michalsky_rejected_filter3)
sgpmfrsrlangleyE13.c1: - number of points used in final linear fit for the Direct Broadband(michalsky_number_points_broadband)
- rejection flag for Direct Narrowband Filter4(michalsky_badflag_filter4)
- standard deviation around regression line for the Direct Narrowband Filter4(michalsky_standard_deviation_filter4)
- rejection flag for Direct Narrowband Filter1(michalsky_badflag_filter1)
- error in final linear fit for the Direct Narrowband Filter4(barnard_error_fit_filter4)
- standard deviation around regression line for the Direct Narrowband Filter5(michalsky_standard_deviation_filter5)
- number of points used in final linear fit for the Direct Narrowband Filter1(michalsky_number_points_filter1)
- rejection flag for Direct Narrowband Filter6(barnard_badflag_filter6)
- standard deviation around regression line for the Direct Narrowband Filter3(michalsky_standard_deviation_filter3)
- percentage of initial points used in final linear fit for the Direct Narrowband
Filter1(barnard_good_fraction_filter1) - optical depth for the Direct Narrowband Filter4(barnard_optical_depth_filter4)
- percentage of initial points used in final linear fit for the Direct Broadband(barnard_good_fraction_broadband)
- percentage of initial points used in final linear fit for the Direct Narrowband
Filter1(michalsky_good_fraction_filter1) - rejection flag for Direct Narrowband Filter5(barnard_badflag_filter5)
- rejection flag for Direct Narrowband Filter5(michalsky_badflag_filter5)
- percentage of initial points used in final linear fit for the Direct Narrowband
Filter3(barnard_good_fraction_filter3) - standard deviation around regression line for the Direct Narrowband Filter2(michalsky_standard_deviation_filter2)
- number of points used in final linear fit for the Direct Narrowband Filter6(michalsky_number_points_filter6)
- number of points used in final linear fit for the Direct Narrowband Filter3(barnard_number_points_filter3)
- rejection flag for Direct Broadband(barnard_badflag_broadband)
- percentage of initial points used in final linear fit for the Direct Narrowband
Filter5(barnard_good_fraction_filter5) - optical depth for the Direct Narrowband Filter6(barnard_optical_depth_filter6)
- error in final linear fit for the Direct Narrowband Filter5(barnard_error_fit_filter5)
- number of points used in final linear fit for the Direct Narrowband Filter3(michalsky_number_points_filter3)
- percentage of initial points used in final linear fit for the Direct Narrowband
Filter3(michalsky_good_fraction_filter3) - number of points used in final linear fit for the Direct Broadband(barnard_number_points_broadband)
- optical depth for the Direct Narrowband Filter3(michalsky_optical_depth_filter3)
- number of points used in final linear fit for the Direct Narrowband Filter2(michalsky_number_points_filter2)
- rejection flag for Direct Narrowband Filter1(barnard_badflag_filter1)
- percentage of initial points used in final linear fit for the Direct Narrowband
Filter2(michalsky_good_fraction_filter2) - error in final linear fit for the Direct Narrowband Filter6(barnard_error_fit_filter6)
- error in optical depth (slope) of final linear fit for the Direct Narrowband
Filter4(barnard_error_slope_filter4) - percentage of initial points used in final linear fit for the Direct Narrowband
Filter2(barnard_good_fraction_filter2) - percentage of initial points used in final linear fit for the Direct Narrowband
Filter6(michalsky_good_fraction_filter6) - percentage of initial points used in final linear fit for the Direct Broadband(michalsky_good_fraction_broadband)
- optical depth for the Direct BroadBand(michalsky_optical_depth_broadband)
- optical depth for the Direct Narrowband Filter2(michalsky_optical_depth_filter2)
- percentage of initial points used in final linear fit for the Direct Narrowband
Filter4(michalsky_good_fraction_filter4) - error in optical depth (slope) of final linear fit for the Direct Narrowband
Filter6(barnard_error_slope_filter6) - optical depth for the Direct Narrowband Filter4(michalsky_optical_depth_filter4)
- rejection flag for Direct Narrowband Filter6(michalsky_badflag_filter6)
- number of points used in final linear fit for the Direct Narrowband Filter5(barnard_number_points_filter5)
- optical depth for the Direct Narrowband Filter5(barnard_optical_depth_filter5)
- number of points used in final linear fit for the Direct Narrowband Filter6(barnard_number_points_filter6)
- percentage of initial points used in final linear fit for the Direct Narrowband
Filter6(barnard_good_fraction_filter6) - optical depth for the Direct Narrowband Filter1(michalsky_optical_depth_filter1)
- error in optical depth (slope) of final linear fit for the Direct Narrowband
Filter2(barnard_error_slope_filter2) - optical depth for the Direct Narrowband Filter6(michalsky_optical_depth_filter6)
- error in final linear fit for the Direct BroadBand(barnard_error_fit_broadband)
- percentage of initial points used in final linear fit for the Direct Narrowband
Filter5(michalsky_good_fraction_filter5) - percentage of initial points used in final linear fit for the Direct Narrowband
Filter4(barnard_good_fraction_filter4) - standard deviation around regression line for the Direct Narrowband Filter6(michalsky_standard_deviation_filter6)
- number of points used in final linear fit for the Direct Narrowband Filter4(michalsky_number_points_filter4)
- rejection flag for Direct Narrowband Filter3(michalsky_badflag_filter3)
- Angstrom exponent(michalsky_angstrom_exponent)
- error in optical depth (slope) of final linear fit for the Direct Narrowband
Filter5(barnard_error_slope_filter5) - error in optical depth (slope) of final linear fit for the Direct Narrowband
Filter3(barnard_error_slope_filter3) - rejection flag for Direct Narrowband Filter2(barnard_badflag_filter2)
- rejection flag for Direct Broadband(michalsky_badflag_broadband)
- error in final linear fit for the Direct Narrowband Filter2(barnard_error_fit_filter2)
- optical depth for the Direct Narrowband Filter1(barnard_optical_depth_filter1)
- number of points used in final linear fit for the Direct Narrowband Filter4(barnard_number_points_filter4)
- Angstrom exponent(barnard_angstrom_exponent)
- standard deviation around regression line for the Direct BroadBand(michalsky_standard_deviation_broadband)
- number of points used in final linear fit for the Direct Narrowband Filter1(barnard_number_points_filter1)
- optical depth for the Direct Narrowband Filter2(barnard_optical_depth_filter2)
- rejection flag for Direct Narrowband Filter2(michalsky_badflag_filter2)
- error in final linear fit for the Direct Narrowband Filter3(barnard_error_fit_filter3)
- number of points used in final linear fit for the Direct Narrowband Filter5(michalsky_number_points_filter5)
- rejection flag for Direct Narrowband Filter3(barnard_badflag_filter3)
- error in optical depth (slope) of final linear fit for the Direct Broadband(barnard_error_slope_broadband)
- optical depth for the Direct BroadBand(barnard_optical_depth_broadband)
- rejection flag for Direct Narrowband Filter4(barnard_badflag_filter4)
- standard deviation around regression line for the Direct Narrowband Filter1(michalsky_standard_deviation_filter1)
- error in final linear fit for the Direct Narrowband Filter1(barnard_error_fit_filter1)
- optical depth for the Direct Narrowband Filter5(michalsky_optical_depth_filter5)
- number of points used in final linear fit for the Direct Narrowband Filter2(barnard_number_points_filter2)
- error in optical depth (slope) of final linear fit for the Direct Narrowband
Filter1(barnard_error_slope_filter1) - optical depth for the Direct Narrowband Filter3(barnard_optical_depth_filter3)
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