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and O
strategies O
, O
and O
in O
terms O
of O
zenith B-climate-properties
tropospheric I-climate-properties
delays I-climate-properties
( O
ZTD B-climate-properties
) O
and O
horizontal O
gradients O
with O
those O
of O
ERA B-climate-datasets
- I-climate-datasets
Interim I-climate-datasets
numerical O
weather O
model O
( O
NWM O
) O
reanalysis O
. O
When O
compared O
to O
the O
GOP B-climate-models
Repro1 I-climate-models
solution O
, O
the O
results O
of O
the O
GOP B-climate-models
Repro2 I-climate-models
yielded O
improvements O
of O
approximately O
50 O
% O
and O
25 O
% O
in O
the O
repeatability O
of O
the O
horizontal O
and O
vertical O
components O
, O
respectively O
, O
and O
of O
approximately O
9 O
% O
in O
tropospheric B-climate-nature
parameters O
. O
Vertical O
repeatability O
was O
reduced O
from O
4.14 O
mm O
to O
3.73 O
mm O
when O
using O
the O
VMF1 B-climate-models
mapping I-climate-models
function I-climate-models
, O
a O
priori O
ZHD B-climate-properties
, O
and O
non O
- O