ICESS , University of California, Santa Barbara

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A short C program to convert a point at latitude and longitude to row and column numbers in sinusoidal (SIN) or integerized sinusoidal (ISIN) tile,
in the V4 MOD11 and V3 MOD11 products, respectively.

If you want to know the status of recent V5 land tests for the MODIS LST products in the coming Collection 5 (V5)
please download the 1st semi-annual report of 2005, NNG04HZ15C-2005-1st.pdf and the 2nd semi-annual report of 2005, NNG04HZ15C-2005-2nd.pdf.

Your feedbacks are welcome!

What is your opinion on the way of dealing with the LSTs affected by cloud contaminations modestly (only by 4-10K varying with land-cover types)?
Remove them or put a flag on the most significant bit in the unsigned 16-bit integer (adding 32768 on the LST data)?
If we use the flag, we need to change the valid_range to 7500-32767 from 7500-65535 in the file spec and
we have to check each LST value before using it or not:
if the value is in the range 7500-32767, just use it as before;
if the value is larger than 32767 and you do not want to use it, you can treat it as fillvalue;
if the value is larger than 32767 and you still want to use it, subtract 32768 from the value and then multiply the scale_factor 0.02
for its real LST value (in unit K)

If you want to know
what is the impact of the MODIS Cloudmask on the MODIS LST products?
how to screen off the cloud-contaminated LSTs in the LST products?
how to validate the surface temperature and emissivity in the 5km LST (MOD11B1) product?
and what is the quality of the MOD11B1 product generated by the day/night LST algorithm?
please download the 2nd semi-annual report of 2003, wan2003_2.pdf.

The cloud-contaminated-LST removed V4 CMG LST products from Terra MODIS data  can be downloaded from the MODIS LST SCF site.

The cloud-contaminated-LST removed V4 CMG LST products from Aqua MODIS data  can be downloaded from the MODIS LST SCF site for test studies.

Status of the MODIS LST product as of 24 July 2002 ( This status report is also available in ppt format).

Land surface temperature (LST) is one of the key parameters in the physics of land surface processes, combining surface-atmosphere interactions and the energy fluxes between the atmosphere and the ground.

LST is required for a wide variety of scientific studies -- from climatology to hydrology to ecology and biogeology. For example, it is an important factor in modeling large scale hydrological systems, global primary production, and the greenhouse effect. Furthermore, it can be used in agricultural applications (such as evaluating water requirements for wheat and determining frost damage in orange groves).

Status of the MODIS LST production as of 24 December 2001:  the consistent reprocessing for the collection-3  (version 3) product has been nearly completed for the period from early November 2000 to the end of year 2001.   The global LST browse images are available from the MODLAND web page (select collection 3 and MOD11 (Surface Temperature), then click on Submit selectio.

Status of the MODIS LST product as of 24 December 2001: the MODIS LST product has been validated with in situ measurements within 1K in 19 clear-sky cases (including 14 cases over land sites) in 2000 and 2001, in the temperature range of 263-322K and the column water vapor range of 0.4-3cm. ( The status report is also available in ppt format)