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

liugers11 · by **liugers11** » Sat May 20, 2017 11:08 pm America/New_York

Hi,
I cannot download MODIS data from oceandata and even cannot visit oceancolor.gsfc.nasa.gov if I do not use VPN. I guess my IP is blocked by the FTP server. Can you help me to remove the status of be blocked? My IP is xx.xxx.xx.xx and the tracert report is in the accessory. Before be blocked, my downloading speed of MODIS data is quickly (even 3~4 MB/s), is that the reason of the rejection by the FTP server?
Thank you very much.
Best Wishes
Ge

tintinabula · by **tintinabula** » Mon May 22, 2017 12:24 pm America/New_York

Ge,

Your ip may have been temporarily blocked on Friday. Could you please try again and post if you continue to have issues.

liugers11 · by **liugers11** » Mon May 22, 2017 7:35 pm America/New_York

hi, tintinabula
Thank you very much. It still cannot donwload data from oceandata. Can you help me to remove the status of being blocked? Should I limit the download speed if it has been normal to avoid this issue? I really appreciate it.
Best Wishes
Ge

kimlotte · by **kimlotte** » Tue May 30, 2017 12:03 pm America/New_York

Hello.

I am trying to download modis L1A data and it seems that I cannot
1. Download data from 2002 to present if I want to
2. Download data from a user specified region (as opposed to the predefined regions)

I get this error

.:. ERROR .:.
OceanColor Biology Processing Group (OBPG)

We are sorry but an error has occurred. Please use the back button in your browser to return to the previous page or use the link below to return to the Ocean Color home page.

OceanColor Home Page

Every time.

What would be the problem?

Regards,
Kim

OB.DAAC-EDL - amscott · by **OB.DAAC-EDL - amscott** » Tue May 30, 2017 12:47 pm America/New_York

Kim,

What page did you try to download from? Please provide the URL(s)?

by **OB WebDev - norman** » Tue May 30, 2017 12:48 pm America/New_York

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

kimlotte · by **kimlotte** » Wed May 31, 2017 5:29 am America/New_York

Hello.

Thank you for your prompt reply.

- I got to https://oceancolor.gsfc.nasa.gov/cgi/browse.pl?sen=am
- My interest is in MODIS "Aqua". I basically leave everything unchanged except time and my AOI.
- On time, I am interested with data from 2002 to present. I first clicked on "2002" to activate the "Mission" button after the page reloads since it is not active the first time you load the page.
- I then add my lat lon of my AOI (LAT: 10, -20, LON: 30, 70) which is the Kenyan Coast and I click on "Find Swaths".

I can't get past this point, and after a moment of waiting I get the dreadful error.

Those are my steps.

Regards,
Kim

OB.DAAC-EDL - SeanBailey · by **OB.DAAC-EDL - SeanBailey** » Wed May 31, 2017 8:46 am America/New_York

Kim,

Query for a smaller time period or a smaller region. Searching for 15 years of 5 minute granules over such a large region takes a long time (with the current browser DB code). The query is being terminated because it it exceeding the timeout limit on the server.

Sean

by **OB WebDev - norman** » Wed May 31, 2017 8:49 am America/New_York

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** » Wed May 31, 2017 9:10 am America/New_York

Oops, my previous reply was incorrect since I forgot to include
the region of interest. I tried shorter and shorter periods and
finally got six months to work. (A year and a half still did not
work.)

https://oceancolor.gsfc.nasa.gov/cgi/browse.pl?sub=level1or2list&per=CSTM&day=11872+181&sen=am&n=10&s=-20&w=30&e=70&dnm=D

The above search returns 1287 scenes.

Norman