Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 1 4.  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)
 01/06/2021   15:31:38   ( -70.04, 123.51) 01/06/2021   15:31:09  ( -70.03, 123.54)    1.66                29
 01/06/2021   16:21:05   (  69.94, -69.00) 01/06/2021   16:21:53  (  69.92, -68.98)    1.90                48
 01/09/2021   06:58:36   (  70.15,  71.91) 01/09/2021   06:57:23  (  70.15,  71.81)    3.57                73
 01/09/2021   07:48:07   ( -69.98,-120.69) 01/09/2021   07:48:04  ( -70.00,-120.64)    2.91                 3
 01/09/2021   08:37:35   (  69.82,  46.72) 01/09/2021   08:38:47  (  69.84,  46.91)    7.61                72
 01/11/2021   23:15:05   (  70.08,-172.31) 01/11/2021   23:14:17  (  70.07,-172.30)    0.52                48
 01/12/2021   00:04:35   ( -69.97,  -4.82) 01/12/2021   00:04:59  ( -69.97,  -4.83)    0.20                24
 01/14/2021   14:41:50   ( -70.99, 137.29) 01/14/2021   14:40:44  ( -71.04, 134.60)   97.41                66
 01/14/2021   15:31:32   (  70.06, -56.45) 01/14/2021   15:31:11  (  70.05, -56.50)    2.09                21
 01/14/2021   16:21:02   ( -69.96, 111.04) 01/14/2021   16:21:53  ( -69.95, 110.98)    2.55                51
 01/17/2021   06:58:34   ( -70.10,-108.16) 01/17/2021   06:57:22  ( -70.13,-108.16)    3.61                72
 01/17/2021   07:48:01   (  69.98,  59.33) 01/17/2021   07:48:05  (  69.98,  59.38)    2.04                 4
 01/17/2021   08:37:33   ( -69.77,-133.34) 01/17/2021   08:38:45  ( -69.77,-132.98)   13.53                72