Description: | During Reset7 (8/6) the skytracker firmware was upgraded for Y2K. While still at the
site, the mentor noted that the tracker was sticking and replaced it on 8/8/99. The
replacement tracker also failed. Repeated attempts through 8/13 were not successful. After 8/13,
the tracker was not operational.
It was found that the problem was the result of bugs in the Y2K compliant version (2.44)
of the firmware. On 10/14, Jeff Zirzow installed a new tracker with the Y2K non-compliant
version (2.43) of the firmware. It was correctly assumed that the Y2K issues would only
be apparent at the 19991231-20000101 time boundary.
Exact times of changes are not known; noon GMT (midnight Local) was used to adequately
window the time period of the changes. |
Measurements: | twpskyrad60sC2.a1: - PIR shaded standard deviation(pirs_sd)
- PSP shaded standard deviation(psps_sd)
- PSP shaded mean(psps_mean)
- NIP mean(nip_mean)
- PIR shaded minimum(pirs_min)
- NIP standard deviation(nip_sd)
- NIP maximum(nip_max)
- PSP shaded minimum(psps_min)
- PIR shaded maximum(pirs_max)
- PIR shaded mean(pirs_mean)
- NIP minimum(nip_min)
- PSP shaded maximum(psps_max)
more
twpskyrad60sC2.b1: - Downwelling Shortwave Diffuse Hemispheric Irradiance, Pyrgeometer, Minima(down_short_diffuse_hemisp_min)
- Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Standard Deviation(down_long_hemisp2_std)
- Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
- Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Maxima(down_long_hemisp2_max)
- Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
- Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
- Shortwave direct normal irradiance, pyrheliometer, minima(short_direct_normal_min)
- Shortwave direct normal irradiance, pyrheliometer(short_direct_normal)
- Downwelling shortwave diffuse hemispheric irradiance, pyranometer, maxima(down_short_diffuse_hemisp_max)
- Downwelling Shortwave Diffuse Hemispheric Irradiance, Pyranometer, Standard
Deviation(down_short_diffuse_hemisp_std) - Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2(down_long_hemisp2)
- Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Minima(down_long_hemisp2_min)
more
|