Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 12 13.  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)
 12/13/2021   22:25:47   ( -70.15,  20.14) 12/13/2021   22:25:13  ( -70.15,  20.12)    0.91                34
 12/13/2021   23:15:14   (  70.05,-172.36) 12/13/2021   23:15:57  (  70.03,-172.39)    2.19                43
 12/16/2021   13:52:41   (  70.51, -31.08) 12/16/2021   13:51:30  (  70.60, -32.12)   39.47                71
 12/16/2021   14:42:17   ( -70.08, 135.91) 12/16/2021   14:42:04  ( -70.09, 135.98)    3.35                13
 12/16/2021   15:31:44   (  69.97, -56.59) 12/16/2021   15:32:48  (  69.97, -56.52)    2.69                64
 12/19/2021   06:09:16   (  70.16,  84.28) 12/19/2021   06:08:14  (  70.17,  84.32)    2.44                62
 12/19/2021   06:58:45   ( -70.11,-108.16) 12/19/2021   06:58:56  ( -70.09,-108.23)    3.19                11
 12/19/2021   07:48:21   (  69.45,  58.57) 12/19/2021   07:49:29  (  69.44,  60.04)   57.29                68
 12/21/2021   22:25:44   (  70.13,-159.89) 12/21/2021   22:25:04  (  70.12,-159.82)    2.54                40
 12/21/2021   23:15:14   ( -70.02,   7.60) 12/21/2021   23:15:46  ( -70.04,   7.63)    1.88                32
 12/24/2021   13:52:34   ( -70.86, 149.44) 12/24/2021   13:51:25  ( -70.92, 147.38)   75.23                69
 12/24/2021   14:42:12   (  70.15, -43.98) 12/24/2021   14:41:56  (  70.13, -44.05)    3.29                16
 12/24/2021   15:31:43   ( -69.99, 123.44) 12/24/2021   15:32:37  ( -69.99, 123.49)    2.10                54