Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 4 8.  Predictions up to the next  14.0 days:

     Date     Time(LANDSAT-8) LANDSAT-8 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/09/2021   23:14:37   ( -70.14,   7.70) 04/09/2021   23:14:03  ( -70.14,   7.63)    2.70                34
 04/10/2021   00:04:04   (  70.03, 175.19) 04/10/2021   00:04:47  (  70.01, 175.13)    3.43                43
 04/12/2021   14:41:31   (  70.41, -43.66) 04/12/2021   14:40:19  (  70.48, -44.45)   30.34                72
 04/12/2021   15:31:05   ( -70.09, 123.50) 04/12/2021   15:30:55  ( -70.08, 123.49)    0.94                10
 04/12/2021   16:20:32   (  69.98, -69.01) 04/12/2021   16:21:39  (  69.96, -69.02)    2.23                67
 04/15/2021   06:58:04   (  70.14,  71.82) 04/15/2021   06:57:07  (  70.16,  71.82)    3.13                57
 04/15/2021   07:47:34   ( -70.03,-120.70) 04/15/2021   07:47:48  ( -70.03,-120.65)    1.78                14
 04/15/2021   08:37:13   (  69.25,  45.89) 04/15/2021   08:38:20  (  69.27,  47.76)   73.67                67
 04/17/2021   23:14:32   (  70.13,-172.31) 04/17/2021   23:14:00  (  70.12,-172.33)    1.56                32
 04/18/2021   00:04:02   ( -70.03,  -4.82) 04/18/2021   00:04:42  ( -70.03,  -4.88)    2.08                40
 04/20/2021   14:41:28   ( -70.51, 136.47) 04/20/2021   14:40:17  ( -70.60, 135.37)   41.94                71
 04/20/2021   15:31:01   (  70.06, -56.53) 04/20/2021   15:30:53  (  70.07, -56.49)    1.85                 8
 04/20/2021   16:20:31   ( -69.97, 110.97) 04/20/2021   16:21:35  ( -69.98, 110.97)    1.47                64