<s>
The	O
Moderate	B-Application
Resolution	I-Application
Imaging	I-Application
Spectroradiometer	I-Application
(	O
MODIS	B-Application
)	O
is	O
a	O
satellite-based	O
sensor	O
used	O
for	O
earth	O
and	O
climate	O
measurements	O
.	O
</s>
<s>
There	O
are	O
two	O
MODIS	B-Application
sensors	O
in	O
Earth	O
orbit	O
:	O
one	O
on	O
board	O
the	O
Terra	O
(	O
EOS	O
AM	O
)	O
satellite	O
,	O
launched	O
by	O
NASA	O
in	O
1999	O
;	O
and	O
one	O
on	O
board	O
the	O
Aqua	O
(	O
EOS	O
PM	O
)	O
satellite	O
,	O
launched	O
in	O
2002	O
.	O
</s>
<s>
MODIS	B-Application
has	O
now	O
been	O
replaced	O
by	O
the	O
VIIRS	B-Algorithm
,	O
which	O
first	O
launched	O
in	O
2011	O
aboard	O
the	O
Suomi	O
NPP	O
satellite	O
.	O
</s>
<s>
The	O
MODIS	B-Application
instruments	O
were	O
built	O
by	O
Santa	O
Barbara	O
Remote	O
Sensing	O
.	O
</s>
<s>
Support	O
and	O
calibration	O
is	O
provided	O
by	O
the	O
MODIS	B-Application
characterization	O
support	O
team	O
(	O
MCST	O
)	O
.	O
</s>
<s>
With	O
its	O
high	O
temporal	O
resolution	O
although	O
low	O
spatial	O
resolution	O
,	O
MODIS	B-Application
data	O
are	O
useful	O
to	O
track	O
changes	O
in	O
the	O
landscape	O
over	O
time	O
.	O
</s>
<s>
The	O
United	O
States	O
Forest	O
Service	O
's	O
Remote	O
Sensing	O
Applications	O
Center	O
analyzes	O
MODIS	B-Application
imagery	O
on	O
a	O
continuous	O
basis	O
to	O
provide	O
information	O
for	O
the	O
management	O
and	O
suppression	O
of	O
wildfires	O
.	O
</s>
<s>
MODIS	B-Application
utilizes	O
four	O
on-board	O
calibrators	O
in	O
addition	O
to	O
the	O
space	O
view	O
in	O
order	O
to	O
provide	O
in-flight	O
calibration	O
:	O
solar	O
diffuser	O
(	O
SD	O
)	O
,	O
solar	O
diffuser	O
stability	O
monitor	O
(	O
SDSM	O
)	O
,	O
spectral	O
radiometric	O
calibration	O
assembly	O
(	O
SRCA	O
)	O
,	O
and	O
a	O
v-groove	O
black	O
body	O
.	O
</s>
<s>
MODIS	B-Application
has	O
used	O
the	O
marine	O
optical	O
buoy	O
for	O
vicarious	O
calibration	O
.	O
</s>
<s>
The	O
following	O
MODIS	B-Application
Level	O
3	O
(	O
L3	O
)	O
datasets	O
are	O
available	O
from	O
NASA	O
,	O
as	O
processed	O
by	O
the	O
Collection	O
5	O
software	O
.	O
</s>
<s>
Raw	O
MODIS	B-Application
data	O
stream	O
can	O
be	O
received	O
in	O
real-time	O
using	O
a	O
tracking	O
antenna	O
,	O
due	O
to	O
the	O
instrument	O
's	O
direct	O
broadcast	O
capability	O
.	O
</s>
<s>
Alternatively	O
,	O
the	O
scientific	O
data	O
are	O
made	O
available	O
to	O
the	O
public	O
via	O
several	O
World	O
Wide	O
Web	O
sites	O
and	O
FTP	B-Protocol
archives	O
,	O
such	O
as	O
:	O
</s>
<s>
ftp://ladsftp.nascom.nasa.gov/	O
–	O
LAADS	O
underlying	O
FTP	B-Protocol
server	I-Protocol
;	O
</s>
<s>
ftp://n4ftl01u.ecs.nasa.gov/	O
–	O
snow	O
and	O
ice	O
datasets	O
.	O
</s>
<s>
Most	O
of	O
the	O
data	O
are	O
available	O
in	O
the	O
HDF-EOS	B-Application
format	O
—	O
a	O
variant	O
of	O
Hierarchical	B-Application
Data	I-Application
Format	I-Application
prescribed	O
for	O
the	O
data	O
derived	O
from	O
Earth	O
Observing	O
System	O
missions	O
.	O
</s>
