Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 12 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)
 12/13/2017   11:25:00   (  79.71, -92.85) 12/13/2017   11:24:54  (  79.72, -92.72)    2.91                 6
 12/13/2017   12:14:22   ( -79.89,  76.20) 12/13/2017   12:15:34  ( -79.89,  76.22)    0.35                72
 12/16/2017   02:52:11   ( -79.46,-146.40) 12/16/2017   02:51:12  ( -79.46,-146.49)    1.84                59
 12/16/2017   03:41:29   (  79.76,  23.37) 12/16/2017   03:41:47  (  79.75,  23.35)    0.55                18
 12/18/2017   19:08:36   ( -79.62, -29.43) 12/18/2017   19:08:00  ( -79.62, -29.35)    1.70                36
 12/18/2017   19:57:55   (  79.87, 140.13) 12/18/2017   19:58:36  (  79.87, 140.28)    3.11                41
 12/21/2017   11:25:05   ( -79.65,  86.73) 12/21/2017   11:24:53  ( -79.65,  86.70)    0.60                12
 12/21/2017   12:14:24   (  79.90,-103.71) 12/21/2017   12:15:29  (  79.90,-103.67)    0.86                65
 12/24/2017   02:52:12   (  79.49,  33.82) 12/24/2017   02:51:06  (  79.49,  33.82)    0.27                66