Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2021 9 12.  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   (  79.27,  32.27) 09/14/2021   02:51:40  (  79.26,  32.14)    2.75                26
 09/14/2021   03:41:25   ( -79.58,-157.96) 09/14/2021   03:42:16  ( -79.58,-157.97)    0.26                51
 09/16/2021   19:08:32   (  79.44, 149.27) 09/16/2021   19:08:31  (  79.44, 149.29)    0.35                 1
 09/16/2021   19:56:12   ( -81.83,  -4.81) 09/16/2021   19:57:25  ( -81.29,  -4.54)   59.81                73
 09/19/2021   10:35:41   ( -79.27,  96.37) 09/19/2021   10:34:48  ( -79.27,  96.43)    1.28                53
 09/19/2021   11:25:02   (  79.45, -94.78) 09/19/2021   11:25:27  (  79.44, -94.90)    2.41                25
 09/22/2021   02:52:09   ( -79.31,-147.47) 09/22/2021   02:51:42  ( -79.31,-147.50)    0.61                27
 09/22/2021   03:41:27   (  79.60,  22.18) 09/22/2021   03:42:17  (  79.61,  22.28)    2.10                50
 09/24/2021   19:08:37   ( -79.39, -31.08) 09/24/2021   19:08:36  ( -79.38, -31.16)    1.77                 1