Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2019 4 10.  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)
 04/12/2019   19:58:28   (  79.46, 136.93) 04/12/2019   19:57:59  (  79.45, 136.84)    2.04                29
 04/12/2019   20:47:47   ( -79.76, -53.28) 04/12/2019   20:48:35  ( -79.76, -53.20)    1.65                48
 04/15/2019   12:14:51   (  79.61,-106.08) 04/15/2019   12:14:47  (  79.62,-106.01)    1.41                 4
 04/15/2019   13:04:14   ( -79.76,  62.67) 04/15/2019   13:05:28  ( -79.76,  62.61)    1.22                74
 04/18/2019   03:41:58   ( -79.36,-159.60) 04/18/2019   03:41:03  ( -79.35,-159.74)    2.96                55
 04/18/2019   04:31:17   (  79.62,   9.83) 04/18/2019   04:31:39  (  79.62,   9.77)    1.28                22
 04/20/2019   19:58:21   ( -79.51, -42.68) 04/20/2019   19:57:51  ( -79.51, -42.63)    1.12                30
 04/20/2019   20:47:40   (  79.76, 126.80) 04/20/2019   20:48:27  (  79.77, 126.94)    2.86                47
 04/23/2019   12:14:47   ( -79.55,  73.45) 04/23/2019   12:14:43  ( -79.54,  73.41)    0.87                 4