Solar Wind Density at 2157-2253 UTC Feb 4, 2015 = 0.0

[Skipmuck]

 
From the NOAA website...is this some kind of mistake or instrument breakdown on the GOES satellite? I don't recall seeing a zero figure before....
Solar Wind Data
Provides solar wind velocity and energetic particle intensity
Updated at: 2157Z on February 4, 2015
 Velocity (km/s):    443.9
 Density (protons/cm3):    0.0
Updated at: 2204Z on February 4, 2015
 Velocity (km/s):    433.3
 Density (protons/cm3):    0.0
Updated at: 2212Z on February 4, 2015
 Velocity (km/s):    418.5
 Density (protons/cm3):    0.0
Updated at: 2229Z on February 4, 2015
 Velocity (km/s):    434.7
 Density (protons/cm3):    0.0
Updated at: 2253Z on February 4, 2015
 Velocity (km/s):    429.5
 Density (protons/cm3):    0.0
We are getting some density as of 2257 UTC...guess everything is OK
Updated at: 2257Z on February 4, 2015
 Velocity (km/s):    427.5
 Density (protons/cm3):    0.1
I spoke too soon....back to nada
Updated at: 2313Z on February 4, 2015
 Velocity (km/s):    431.8
 Density (protons/cm3):    0.0
Updated at: 2328Z on February 4, 2015
 Velocity (km/s):    420.5
 Density (protons/cm3):    0.0
Updated at: 0029Z on February 5, 2015
 Velocity (km/s):    443.8
 Density (protons/cm3):    0.0

Hmmm....."where have all the protons gone...long time passing"

Updated at: 0305Z on February 5, 2015
 Velocity (km/s):    429.5
 Density (protons/cm3):    0.0