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There are many papers which cover such topic... however here is some that may be helpful for you... http://www.knmi.nl/omi/research/documents/ http://www.ncbi.nlm.nih.gov/pubmed/19843549 http://www.atmos-chem-phys.net/10/8839/2010/acp-10-8839-2010.pdf http://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd=22&cad=rja&uact=8&ved=0CDQQFjABOBQ&url=http%3A%2F%2Fwww.acd.ucar.edu%2FEvents%2FMeetings%2FAir_Quality_Remote_Sensing%2FPresentations%2F1.3.Goldberg.pdf&ei=6eUpU8v0IIWq4ASxsYGoAg&usg=AFQjCNE3ZunRy_3wr1Bp8iamJQU4wVmfNA&sig2=yDA2Mz0ieF6O7NBsLBiqZQ&bvm=bv.62922401,d.bGE Have fun

Thanks for the response. I have calculated LST three ways: 1. Uncorrected at-satellite 2. Corrected temperature via Atmospheric Correction Parameter Calculator and radiative transfer equation 3. The Jimenez-Sobrino (2003) single-channel method. I have estimated emissivity using the NDVI Thresholds method as per Sobrino et al. 2004. For the Atmospheric Correction Parameter Calculator, I tried a number of different options to see how upwelling and downwelling radiance and atmospheric transmittance would be affected. I tried it with and without surface conditions, with and without interpolation, with summer and winter atmospheres, and with an altitude of 0 to 0.1 km (the weather station in my study area is on top of a tall building, at an elevation of about 300 ft.). Overall, these changes didn't have much impact on upwelling and downwelling radiance and atmospheric transmittance. I'm just a bit confused as to why uncorrected at-satellite temperatures are so much hotter than weather station temperatures-- especially in this area. I would expect ground surface to be a bit hotter than air temperature, but in a muggy area with lots of water vapor, I would expect the thermal radiance sensed by the satellite to be much lower than that measured on the ground, as water vapor between the ground and satellite should absorb radiance. I thought the "cooling" impact of water vapor would exceed the "warming" impact of LST vs air temperature. I know Band 6 is in the atmospheric window, but I still thought water vapor would be a big enough deal to absorb enough radiance to make uncorrected at-satellite temperatures appear cooler than weather station temperatures. I guess I was just wrong about that? One last question: When you have used Jimenez-Sobrino, how did you estimate total atmospheric water vapor content? Thanks, Anthony

fme does has these functions. do read up on it's transformers. it able to work with large data cause it's pipe in. another solution is QGIS. it's free and read that it's proccesing more efficient than arcgis.

Update: I was just reviewing some literature and noticed similar results (Yang and Wang, 2002; www.ltrs.uri.edu/research/LST_page/paper4.doc‎). Their uncorrected at-satellite temperatures were also significantly higher than station-based readings. Their research was conducted very close to my study area. Am I fundamentally misunderstanding something about comparing satellite-estimated LST with station measurements? My recollection from literature is that multiple studies have done this and errors are usually rather small, and I don't recall reading that anything special need be done when comparing satellite estimated LST with station measured temperature. I know satellites are measuring the actual ground surface temperature based on its brightness temperature, and I know temperature stations are measuring air temperature and not ground surface temperature, but based on the literature I've reviewed I would have expected uncorrected temperatures to be a bit on the cool side based on atmospheric absorption between the land surface and satellite. Moreover, I would have expected uncorrected temperatures to be a bit closer than 7 degrees F! I don't know what the exact lapse rate in this area is, but I can't imagine it's high enough to account for this discrepancy!

do try FME safe. they have a 64-bit version in order to make use of max ram.

Update: I found another station in my study area. The at-satellite temperature there is also about 7 degrees higher than the instrumental LST. I also just tried a Landsat image from a different date. I'm seeing more or less the same problem: at-satellite temperature is about 7 degrees too high at both stations. I'm perplexed here, and I'm quickly running out of ideas. Anyone have any ideas? Also, this is where I read that image acquisition times are in GMT: http://landsat.usgs.gov/acquisition_time_for_an_image.php

I think you should have a look on OMI satellite and its abilities to estimate some gases, aerosols and air quality... http://ozoneaq.gsfc.nasa.gov/ You can as well access the data from here: http://disc.sci.gsfc.nasa.gov/Aura/data-holdings/OMI Have fun

Hi everybody, maybe you go to find useful I am making a map in Map Info. Huge, a lot of layers, included contours at 5 m. I am using what I think it is a strong laptop. I7, 16 GB memory, a SSD disk. But MapInfo is still hanging often, meaning when I select a contour I must expect time to time over 10 seconds to fulfil the command. Same for redrawing and others. I just install software, PrimoCache. It is doing something like an extra cache for the disks, outside of windows normal buffers. Everything is working faster now included other jobs. Mapinfo especially. The software is a shareware with a generous trial, 90days. Maybe will be useful; also for other GIS Regards www.romexsoftware.com/en-us/primo-cache

hem approx 400 km from the volcano

Somehow i never get used to of it. Jet audio was my favorite. After that it was mp classic, then back to jet audio, then KMP. Now its WMP in windows, and Totem in Ubuntu.

Is very sad that Winamp shutdown I like it , regards

Google seems using new code name randomly on each version (not to follow exact pattern, like new code name each new major version) but who care, I hope my smartphone , acer got update ,

I change my phone from nokia after symbian failure,

Almost fully with Live. Syncs all my office and personal emails, calendars. I wish Yahoo can learn something from them. Done with BB?