#ttt discrepancy (atlantic vs local) testing

pac=90/295/-72/65
ind=10/150/-68/32
atl=-100/50/-68/75
glo=0/360/-80/75
glo=-180/180/-80/75

#Caribbean earthquake
epi=-61.64/16.75

#TTTv4:

ot4=2026/02/24/02/30/00

time ttt_client gebco_5m -E$epi -R$atl -O$ot4 -S5/-250 -N64 -Tatl.grd
time ttt_client -Atide.tmp -Tatl.grd -PT > eta_atl.tmp

time ttt_client gebco_5m -E$epi -R$glo -O$ot4 -S5/-250 -N64 -Tglo.grd
time ttt_client -Atide.tmp -Tglo.grd -PT > eta_glo.tmp

paste eta_atl.tmp eta_glo.tmp  | awk '{print $3,$6}' | more

#TTTv3:

ot3=02/24/2026/02/30/00

ttt64 gebco_5m -E$epi -O$ot3 -R$atl -S5.0/-250.0 -Tatl3.grd
ttt_pick tide.tmp -Gatl3.grd > eta_atl3.tmp

ttt64 gebco_5m -E$epi -O$ot3 -R$glo -S5.0/-250.0 -Tglo3.grd
ttt_pick tide.tmp -Gglo3.grd > eta_glo3.tmp

paste eta_atl3.tmp eta_glo3.tmp  | awk '{print $3,$6}' | more


# Observations:

# Versions are self consistent b/t local and global domains:

[ptwc@water-p:~]$ paste eta_atl.tmp eta_glo.tmp  | awk '{print $1,$2,$3,$6}' | head
-61.796 16.305 0.208733 0.208733
-61.072 16.303 0.21832 0.21832
-62.206 16.803 0.271285 0.271285
-61.5 15.5833 0.432353 0.432353
-61.783 17.15 0.465204 0.465204
-61.389 15.314 0.493505 0.493505
-61.5 16.1667 0.519841 0.519841
-62.71 17.29 0.536304 0.536304
-61.227 14.808 0.57486 0.57486
-61.063 14.602 0.720305 0.720305

[ptwc@water-p:~]$ paste eta_atl3.tmp eta_glo3.tmp  | awk '{print $1,$2,$3,$6}' | head
-89.8333 13.5 26.8137 26.8137
-99.8333 16.75 27.2095 27.2095
-74.418 39.355 5.43397 5.43397
-99.9167 16.75 27.1152 27.1152
49.9167 8 23.4739 25.3815
-67.165 18.457 1.29257 1.29257
8.76 41.92 11.0866 11.0866
-81.106 24.711 4.98165 4.98165
-8.33333 37.0833 8.03937 8.03937
29.885 31.212 15.0026 15.0026

Again, both versions spit out the same answers even with different regions but the two versions don't agree:

[ptwc@water-p:~]$ sort -k 3,3 eta_atl3.tmp | head -n 5
-61.796 16.305  0.179855
-62.206 16.803  0.21344
-61.072 16.303  0.233824
-61.783 17.15   0.375531
-61.5   15.5833 0.430765
[ptwc@water-p:~]$ head -n 5 eta_atl.tmp
-61.796 16.305  0.208733
-61.072 16.303  0.21832
-62.206 16.803  0.271285
-61.5   15.5833 0.432353
-61.783 17.15   0.465204

[ptwc@water-p:~]$ sort -k 3,3 eta_glo3.tmp | head -n 5
-61.796 16.305  0.179855
-62.206 16.803  0.21344
-61.072 16.303  0.233824
-61.783 17.15   0.375531
-61.5   15.5833 0.430765
[ptwc@water-p:~]$ head -n 5 eta_glo.tmp
-61.796 16.305  0.208733
-61.072 16.303  0.21832
-62.206 16.803  0.271285
-61.5   15.5833 0.432353
-61.783 17.15   0.465204

You can see the discrepancy above. Note the travel time differences for the first station (0.179855 vs 0.208733). 

Also note that the new version sorts the output by increasing traveltime whereas the old version keeps the non-sequential ordering in the tide station file.