Solar wind observations collected from Faraday Cup on DSCOVR satellite - cycle peak identification

solar wind alpha density

Possible second proton peak between the proton and alpha particle peaks

Alpha particle peak height exceeds expected threshold

Proton velocity X component in GSE coordinates value out of expected range

Proton velocity Y component in GSE coordinates value out of expected range

Out of range: unknown - no measurements in this cycle exceeded the noise threshold.

Proton peak identified but not bounded by <10% current values

solar wind alpha temperature

Unresolved proton peak, peak band consists of fewer than 3 voltage windows

Likely alpha particle confusion due to non-negligible alpha particle flux which may have contributed to currents measured in the proton peak range. Threshold defined as the two peaks being within two thermal widths of each other.

Out of range: high - the proton peak current occurred in the last window of the measurement cycle.

Out of range: low - the proton peak current occurred in the first window of the measurement cycle.

One or more measurements were extracted from a packet whose timestamp was in the future at the point of processing

One or more measurements were extracted from a packet whose timestamp was older than the threshold at the point of processing

Fill

Normal operation mode (full sweep)

Alpha particle velocity X component in GSM coordinates value out of expected range

Alpha particle velocity Y component in GSM coordinates value out of expected range

Alpha particle velocity Z component in GSM coordinates value out of expected range

AOCS non-science mode (spacecraft maneuver/safehold)

Proton density value out of expected range

Proton temperature value out of expected range

Reduced alpha particle data quality; peak identified but resulting science data subject to high uncertainties

Instrument in calibration mode

Proton speed value out of expected range

solar wind proton velocity Y component in Geocentric Solar Magnetospheric coordinates

solar wind proton velocity X component in Geocentric Solar Magnetospheric coordinates

solar wind proton speed

solar wind proton velocity Z component in Geocentric Solar Magnetospheric coordinates

solar wind proton velocity X component in Geocentric Solar Ecliptic coordinates

date and time for each observation

solar wind proton velocity Z component in Geocentric Solar Ecliptic coordinates

solar wind proton velocity Y component in Geocentric Solar Ecliptic coordinates

solar wind proton temperature

solar wind proton density

solar wind alpha velocity Y component in Geocentric Solar Ecliptic coordinates

solar wind alpha velocity X component in Geocentric Solar Ecliptic coordinates

solar wind alpha velocity X component in Geocentric Solar Magnetospheric coordinates

solar wind alpha velocity Z component in Geocentric Solar Ecliptic coordinates

solar wind alpha velocity Z component in Geocentric Solar Magnetospheric coordinates

solar wind alpha velocity Y component in Geocentric Solar Magnetospheric coordinates

Loss of proton peak

solar wind alpha speed

One or more measurements were backfilled from the spacecraft recorder and therefore were not available to forecasters in real-time

Alpha particle peak identified above the expected position

Alpha particle peak identified below the expected position

Alpha particle peak identified but not bounded by <10% current values

Out of range: unknown - no measurements in this cycle to the right of the proton peak exceeded the noise threshold.

Out of range: high - the alpha particle peak current occurred in the last window of the measurement cycle.

Likely proton confusion due to non-negligible proton flux which may have contributed to currents measured in the alpha particle peak range. Threshold defined as the two peaks being within two thermal widths of each other.

Unresolved alpha particle peak, peak band consists of fewer than 3 voltage windows

Alpha particle density value out of expected range

Alpha particle speed value out of expected range

Alpha particle velocity X component in GSE coordinates value out of expected range

Alpha particle temperature value out of expected range

Proton velocity X component in GSM coordinates value out of expected range

Proton velocity Z component in GSE coordinates value out of expected range

Proton velocity Z component in GSM coordinates value out of expected range

Proton velocity Y component in GSM coordinates value out of expected range

Alpha particle velocity Z component in GSE coordinates value out of expected range

Alpha particle velocity Y component in GSE coordinates value out of expected range

Loss of alpha particle peak

Reduced proton data quality; peak identified but resulting science data subject to high uncertainties