sttkangle	sttkangle
sttkarea	sttkarea
sttkeccentr	sttkeccentr
sttkellipseplot	sttkellipseplot
sttklength	sttklength
sttknorm	sttknorm
sttksdx	sttksdx
sttksdy	sttksdy
sttkveloc	sttkveloc
sttkxmdfreq	sttkxmdfreq
sttkxveloc	sttkxveloc
sttkymdfreq	sttkymdfreq
sttkyveloc	sttkyveloc
