  Catalina Sky Survey (CSS) is a major survey of Near-Earth Objects (NEOs). In
a recent work, we used CSS observations from 2005-2012 to develop a new
population model of NEOs (NEOMOD). CSS's G96 telescope was upgraded in 2016 and
detected over 10,000 unique NEOs since then. Here we characterize the NEO
detection efficiency of G96 and use G96's NEO detections from 2013-2022 to
update NEOMOD. This resolves previous model inconsistencies related to the
population of large NEOs. We estimate there are 936+/-29 NEOs with absolute
magnitude H<17.75 (diameter D>1 km for the reference albedo p_V=0.14). The
slope of the NEO size distribution for H=25-28 is found to be relatively
shallow (cumulative index 2.6) and the number of H<28 NEOs (D>9 m) is
determined to be (1.20+/-0.04)x10^7. Small NEOs have a different orbital
distribution and higher impact probabilities than large NEOs. We estimate
0.034+/-0.002 impacts of H<28 NEOs on the Earth per year, which is near the low
end of the impact flux range inferred from atmospheric bolide observations.
Relative to a model where all NEOs are delivered directly from the main belt,
the population of small NEOs detected by G96 shows an excess of
low-eccentricity orbits with a=1--1.6 au that appears to increase with H. We
suggest that the population of very small NEOs is boosted by tidal disruption
of large NEOs during close encounters to the terrestrial planets. When the
effect of tidal disruption is (approximately) accounted for in the model, we
estimate 0.06+/-0.01 impacts of H<28 NEOs on the Earth per year, which is more
in line with the bolide data.
