Search found 13 matches

by febryanto25
Mon Oct 25, 2021 9:55 am America/New_York
Forum: All Questions/Comments
Question: MODIS Aqua Chl-a Product
Replies: 3

Re: MODIS Aqua Chl-a Product

Sorry, I still don't get the point. Firstly, the orbital period is 99 minutes means it takes 99 minutes for the Aqua satellite to move from the south pole to the north pole. Am I correct? Secondly, you mentioned over 24 hours we get 14.5 orbits. In my imagination, the Aqua satellite provides 14.5 or...
by febryanto25
Sun Oct 24, 2021 11:38 am America/New_York
Forum: All Questions/Comments
Question: MODIS Aqua Chl-a Product
Replies: 3

MODIS Aqua Chl-a Product

As far as I know, the Aqua MODIS satellite observes the equator in the afternoon at about 1.30 PM, which means the Aqua MODIS satellite will only have one measurement over the equator region at 1.30 PM, and so for other regions (please correct me if I am wrong). My question is, how are the Level-3 d...
by febryanto25
Wed Jul 28, 2021 11:43 am America/New_York
Forum: All Questions/Comments
Question: MODIS SST product
Replies: 21

Re: MODIS SST product

Hi.
If we want to generate the 11 ┬Ám daily L3 SST product from Aqua satellite which has two products like night time and day time SST, which one should we choose for representing the daily SST? Night time or day time? or take average of both data? and why? Thank you.
by febryanto25
Wed May 05, 2021 1:11 am America/New_York
Forum: All Questions/Comments
Question: MODIS Aqua SST and Chl-a Product
Replies: 2

MODIS Aqua SST and Chl-a Product

I just downloaded monthly SST day time data MODISA_L3m_SST_Monthly_4km_vR2019.0 from Giovanni, I found 'qual_flag' is one of the variable in addition to the SST product itself. What is the purpose of 'qual_flag' variable? Is this variable like a correction to the SST product or something? Do I need ...
by febryanto25
Sun Apr 18, 2021 10:25 pm America/New_York
Forum: All Questions/Comments
Question: MODIS SST product
Replies: 21

Re: MODIS SST product

Thank you for the answers! I do appreciate that.
by febryanto25
Wed Apr 07, 2021 10:36 pm America/New_York
Forum: All Questions/Comments
Question: MODIS SST product
Replies: 21

Re: MODIS SST product

Thank you for the answers. Regarding binning over time is affected by water motion, which has a smoothing effect. What do you mean by that? And, could you plese describe more about Moire patterns?
by febryanto25
Wed Apr 07, 2021 3:35 am America/New_York
Forum: All Questions/Comments
Question: MODIS SST product
Replies: 21

Re: MODIS SST product

Thank you for the answer. Regarding the MODIS resolution at nadir is 1 km, why the resolution of MODIS products like chlorophyll-a, sst, and others are different from the sensor resolution of MODIS itself? For instance, the resolution of monthly SST Aqua MODIS level 3 is 4 km while the sensor resolu...
by febryanto25
Sat Apr 03, 2021 1:07 am America/New_York
Forum: All Questions/Comments
Question: MODIS SST product
Replies: 21

Re: MODIS SST product

Thank you for the explanations. Could you please describe more detail about the terms of 'binned' based on your answer?
by febryanto25
Fri Apr 02, 2021 1:19 pm America/New_York
Forum: All Questions/Comments
Question: MODIS SST product
Replies: 21

Re: MODIS SST product

I mean the monthly data. Why there are still SST value while there are lots of cloud cover in the tropical area?

What do you mean by SST can provide data with some cloud cover where there will be no visible range data?
by febryanto25
Fri Apr 02, 2021 4:00 am America/New_York
Forum: All Questions/Comments
Question: MODIS SST product
Replies: 21

Re: MODIS SST product

Thank you for the answer. Following your answer, how can the SST product level 3 of MODIS Terra/Aqua have a SST value while there are lots of cloud cover especially in the tropical area?
What kind of cloud-removal algorithm is applied in the SST product level 3 of MODIS Terra/Aqua?