Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2021 9 13.  Predictions up to the next  14.0 days:

     Date     Time(AURA) AURA Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/14/2021   02:52:06   (  79.28,  32.33) 09/14/2021   02:51:40  (  79.27,  32.20)    2.91                26
 09/14/2021   03:41:25   ( -79.59,-157.89) 09/14/2021   03:42:16  ( -79.59,-157.91)    0.42                51
 09/16/2021   19:08:33   (  79.41, 149.09) 09/16/2021   19:08:32  (  79.41, 149.08)    0.12                 1
 09/16/2021   19:56:14   ( -81.82,  -5.56) 09/16/2021   19:57:27  ( -81.29,  -5.24)   58.79                73
 09/19/2021   10:35:41   ( -79.24,  96.19) 09/19/2021   10:34:48  ( -79.24,  96.22)    0.71                53
 09/19/2021   11:25:01   (  79.46, -94.70) 09/19/2021   11:25:26  (  79.45, -94.84)    3.03                25
 09/22/2021   02:52:10   ( -79.28,-147.64) 09/22/2021   02:51:43  ( -79.28,-147.71)    1.54                27
 09/22/2021   03:41:28   (  79.58,  22.00) 09/22/2021   03:42:18  (  79.58,  22.05)    1.16                50
 09/24/2021   19:08:38   ( -79.36, -31.25) 09/24/2021   19:08:37  ( -79.35, -31.39)    3.12                 1