Ok next step is a small sequence of watching the asteroid fly past us, we start out falling towards the planet earth at ~16.5 kilometres per second looking at the asteroid falling towards the earth at 17.5kilometres per second. ... The Earth is a sphere with a suitable targa image of the continent mapped onto it, a layer of clouds are also added 5km is probably too high to be totally realistic but I wanted to have some clouds catching illumination where the land was below the horizon. ...

Fortran 90 properties already in CF77 . ... Only the old form (fix form) of the source code is available. ... LOGICAL Default KIND number = 8 INTEGER Default int7 int15 KIND number = 6 1 2 digits = 46 7 15 radix = 2 2 2 range = 13 2 4 huge = 70368744177663 127 32767 bit_size = 46 8 16 INTEGER int31 int46 int64 KIND number = 4 6 8 digits = 31 46 63 radix = 2 2 2 range = 9 13 18 huge = 2147483647 70368744177663 9223372036854775807 bit_size = 32 46 46 REAL half Default,single double KIND ...