Search found 17 matches

by yang16
Thu Aug 05, 2021 7:06 pm America/New_York
Forum: Questions/Comments
Question: OCSSW configuration
Replies: 2

Re: OCSSW configuration

Thank you for your reply! Indeed, I made a mistake of my [SeaDAS_install_dir] which should be '/home/mmy/seadas-7.5.3/'.

Good to know the udpate of seadas. I will try it later.

Thank you,
Mengmeng.
by yang16
Thu Aug 05, 2021 5:59 am America/New_York
Forum: Questions/Comments
Question: OCSSW configuration
Replies: 2

OCSSW configuration

Hello! After I install seadas-7.5.3 and ocssw under ubuntu, I ran the following commands in the terminal window: export OCSSWROOT=[SeaDAS_install_dir]/ocssw source $OCSSWROOT/OCSSW_bash.env My [SeaDAS_install_dir] is /Home/seadas-7.5.3/ocssw, and I have OCSSW_bash.env under [SeaDAS_install_dir], but...
by yang16
Fri Jul 02, 2021 10:38 pm America/New_York
Forum: Questions/Comments
Question: How to convert airborne radiance to reflectance?
Replies: 7

Re: How to convert airborne radiance to reflectance?

Hello,

No, I do not need further assistance for now. Thank you for your kind support.

Kind regards,
Mengmeng.
by yang16
Fri Jul 02, 2021 8:33 am America/New_York
Forum: Questions/Comments
Question: How to convert airborne radiance to reflectance?
Replies: 7

Re: How to convert airborne radiance to reflectance?

Hello,

I found one method to convert the airborne at-sensor radiance to at-sensor reflectance (Hanuš et al., 2016). In this method, the at-sensor reflectance (also called apparent reflectance) was calculated by dividing the at-sensor radiance by the downwelling irradiance.

Kind regards,
Mengmeng.
by yang16
Wed Jun 30, 2021 8:16 pm America/New_York
Forum: Questions/Comments
Question: How to convert airborne radiance to reflectance?
Replies: 7

Re: How to convert airborne radiance to reflectance?

Dear NASA Langley ASDC User Services,

I do not know the project/collection of my data, but I only know the data was collected on April 23, 2019 from CASI-1500. My data is the calibrated radiance data in BIP format.

Thank you.
Kind regards,
Mengmeng.
by yang16
Wed Jun 30, 2021 1:45 am America/New_York
Forum: Questions/Comments
Question: How to convert airborne radiance to reflectance?
Replies: 7

Re: How to convert airborne radiance to reflectance?

Dear NASA Langley ASDC User Services, Thank you very much for your advice. Specifically, I want to convert radiance to remote sensing reflectance for CASI-1500 sensor. From the ITRES Standard Processing Manual, I only found the info. that an optical sensor (Incident Light Sensor) used with CASI meas...
by yang16
Mon Jun 28, 2021 5:54 am America/New_York
Forum: Questions/Comments
Question: How to convert airborne radiance to reflectance?
Replies: 7

How to convert airborne radiance to reflectance?

Dear EARTHDATA Forum, I would like to ask one question that how to convert the airborne measured radiance data to the reflectance data? It is known that the satellite measured radiance data can be converted to the reflectance data following this equation: ρTOA = πLTOA/(cosθsF0) Is this formular appl...
by yang16
Tue Jun 22, 2021 4:18 am America/New_York
Forum: Questions/Comments
Question: Rayleigh optical thickness for airborne sensors
Replies: 2

Re: Rayleigh optical thickness for airborne sensors

Hi Sean,

Thank you very much for your detail reply. It helps a lot.

Kind regards,
Mengmeng.
by yang16
Fri Jun 18, 2021 5:30 am America/New_York
Forum: Questions/Comments
Question: Rayleigh optical thickness for airborne sensors
Replies: 2

Rayleigh optical thickness for airborne sensors

Dear EARTHDATA Forumn, I learned that NASA Ocean Color provides Rayleigh optical thickness for satellite sensors (VIIRS, SeaWiFS and MODIS) at different bands. My question is that is it possible to interpolate the Rayleigh optical thickness from a satellite altitude to an airborne sensor altitude, f...
by yang16
Tue May 11, 2021 5:33 am America/New_York
Forum: Questions/Comments
Question: Aerosol type from satellite data
Replies: 2

Re: Aerosol type from satellite data

Hi Jimacker,

Thank you very much for the info. I will check.

Kind regards,
Mengmeng.