1. ISSI Team on Periodicities at Saturn
SKR Periodicities
W. S. Kurth
University of Iowa
ISSI Team on Periodicities at Saturn
26-30 October 2015

3. Using an assumed fixed period, SKR drifts in longitude with time, AND, the rate of drift varies over time. => The period varies with time.

6. The variable SKR period is statistically identical to the Giampieri et al. [2006] period over like intervals, and suggests the period is variable, and not fixed.

19. Rotation Rates & Periods
SLS (Voyager)
Slow SKR (typical)
Fast SKR (typical)
Rotation Rate (deg/day)
810.76
800
816
Period
(Hr)
10.657
10.80
10.59
(Hr Min Sec)
10h 39m 24s
10h 48m
10h 35m

21. Something to try
Use periods determined every 30 days with the Gurnett tracking filter (each hemisphere)
Use as guide period to plot SKR phase over the 240-day period.
Check for intervals of rapid variation in phase
Provide set of guide periods vs time for use with other phenomena

22. Backup

23. SKR vs Local Time RH & LH sources conjugated:
Direct observation of RH+LH vs Local time
Lamy et al., 2007