Search found 145 matches

by OB WebDev - norman
Fri Sep 22, 2017 4:23 pm America/New_York
Forum: Home
Question: Aqua MODIS Calcite product
Replies: 7

Aqua MODIS Calcite product

Hi Lionel,Are you applying the scale (slope) and offset (intercept) to the data?Compare, for example, August 2013 with August 2014.h5dump -a /pic/scale_factor A20132132013243.L3m_MO_PIC_pic_9km.ncHDF5 "A20132132013243.L3m_MO_PIC_pic_9km.nc" {ATTRIBUTE "scale_factor" {  ...
by OB WebDev - norman
Fri Sep 08, 2017 4:56 pm America/New_York
Forum: Home
Question: Do L2 SNPP SST data have a flag to distinguish day/night SST?
Replies: 9

Do L2 SNPP SST data have a flag to distinguish day/night SST?

Hi Jianke,Yes, "Mixed" means that the scene spans the day/night terminator.When I need to know the day/night status of a single pixel, I comparethe pixel's position vector with the solar position vector like this.    /* Get the solar position vector. */    l_sun(yea...
by OB WebDev - norman
Fri Jun 30, 2017 3:57 pm America/New_York
Forum: Home
Question: What's the default for dnm?
Replies: 1

What's the default for dnm?

Hi Bruce,Below are three specific examples.https://oceancolor.gsfc.nasa.gov/cgi/browse.pl?sub=level1or2list&per=MO&day=17136&sen=v0&n=70&s=50&w=-30&e=-5&dnm=Dhttps://oceancolor.gsfc.nasa.gov/cgi/browse.pl?sub=level1or2list&per=MO&day=17136&sen=v0&n=70&...
by OB WebDev - norman
Mon Jun 12, 2017 1:07 pm America/New_York
Forum: Home
Question: best suited sensor and algorithm for my work
Replies: 1

best suited sensor and algorithm for my work

It depends on the lake you are interested in.  Most South Florida lakes will be too smallto monitor with the standard ocean color sensors like MODIS and VIIRS.  Lake Okeechobeeis large enough, but you may need to develop your own bloom-detection algorithm becausethat lake does not meet all...
by OB WebDev - norman
Mon Jun 12, 2017 10:12 am America/New_York
Forum: Home
Question: Geographical coordinate system used for MODIS aqua data
Replies: 4

Geographical coordinate system used for MODIS aqua data

Mohd,Our satellite ocean-color sensors "see" different amounts of light reflectedfrom the water column depending on the optical characteristics of the water(turbidity, presence of chlorophyll, CDOM, etc.).  The number of photonsreturned from the water column decreases exponentially as...
by OB WebDev - norman
Thu Jun 08, 2017 8:29 am America/New_York
Forum: Home
Question: Direct Data Access, how to retrieve metadata?
Replies: 12

Direct Data Access, how to retrieve metadata?

Hi,Our level-2 browser is designed to perform geographical andtemporal searches of the data in our archive.https://oceancolor.gsfc.nasa.gov (/cgi/browse.pl?file=A2017001000000.L2_LAC_OC). Please click on the Help button on that page for more information.Regards,Norman
by OB WebDev - norman
Wed Jun 07, 2017 5:00 pm America/New_York
Forum: Home
Question: IP Blocked
Replies: 4

IP Blocked

What is the IP address that you are coming from?
by OB WebDev - norman
Wed May 31, 2017 9:10 am America/New_York
Forum: Home
Question: Cannot download data from oceandata.sci.gsfc.nasa.gov
Replies: 9

Cannot download data from oceandata.sci.gsfc.nasa.gov

Oops, my previous reply was incorrect since I forgot to includethe region of interest.  I tried shorter and shorter periods andfinally got six months to work.  (A year and a half still did notwork.)https://oceancolor.gsfc.nasa.gov/cgi/browse.pl?sub=level1or2list&per=CSTM&day=11872+...
by OB WebDev - norman
Wed May 31, 2017 8:49 am America/New_York
Forum: Home
Question: Cannot download data from oceandata.sci.gsfc.nasa.gov
Replies: 9

Cannot download data from oceandata.sci.gsfc.nasa.gov

Sean is right.  I did try your search with just the first half of the mission
and got it to return 510,805 results.

https://oceancolor.gsfc.nasa.gov/cgi/browse.pl?sub=level1or2list&per=CSTM&day=11872+3103&sen=am&dnm=D

Norman
by OB WebDev - norman
Tue May 30, 2017 12:48 pm America/New_York
Forum: Home
Question: Cannot download data from oceandata.sci.gsfc.nasa.gov
Replies: 9

Cannot download data from oceandata.sci.gsfc.nasa.gov

Hi Kim,

Could you please be more specific about which pages you were trying to access and
what steps you followed that got you the error page, so that we can try to reproduce
the problem on our end?

Regards,
Norman