Search found 127 matches

by ASDC - cheyenne.e.land
Thu Feb 08, 2024 11:02 am America/New_York
Forum: Questions/Comments
Question: Plotting Total Backscatter Coefficient 532
Replies: 3

Re: Plotting Total Backscatter Coefficient 532

Hello, That user specifically wanted to subset the data at a specific range of latitudes. Here is what the plot looks like when graphed at all latitudes: Here is what the plot looks like when opened in Panoply (note: it is flipped). Panoply is a Panoply plots geo-referenced and other arrays from net...
by ASDC - cheyenne.e.land
Wed Feb 07, 2024 8:18 am America/New_York
Forum: Questions/Comments
Question: Plotting Total Backscatter Coefficient 532
Replies: 3

Re: Plotting Total Backscatter Coefficient 532

Hello,

Thank you for your interest in CALIPSO data.

It appears that there is nothing wrong with your plot. You can verify this if you open the file in Panoply. Looking at the data there is a lot of fill values especially in the lower altitudes like you mentioned (0 - 15 km).

Regards,
ASDC
by ASDC - cheyenne.e.land
Wed Jan 17, 2024 2:32 pm America/New_York
Forum: Questions/Comments
Question: Determination of cloud position in CERES products
Replies: 4

Re: Determination of cloud position in CERES products

Hello, We contacted a member of the CERES Science team and they have stated: CERES and the imager measurements are satellite based and they are measuring the radiation emitted near the top of the cloud. Therefore, the window channel imager radiance after having atmospheric corrections applied is use...
by ASDC - cheyenne.e.land
Tue Jan 16, 2024 2:36 pm America/New_York
Forum: Questions/Comments
Question: Determination of cloud position in CERES products
Replies: 4

Re: Determination of cloud position in CERES products

Hello, Thank you for your interest in CERES data. The cloud effective temperature of the cloud is the temperature returned from the Planck function using the observed imager radiance. The cloud effective height is the corresponding height you would find that temperature in the temperature profile. T...
by ASDC - cheyenne.e.land
Fri Jan 12, 2024 9:42 am America/New_York
Forum: Questions/Comments
Question: Screening the CALIPSO aerosol profiles based on CAD score
Replies: 2

Re: Screening the CALIPSO aerosol profiles based on CAD score

Hello, We used code made by HDF-EOS that graphs the Extinction Coefficient v Altitude and revised it to only plot values based on the CAD Score greater than -20. import os import numpy as np import matplotlib as mpl import matplotlib.pyplot as plt from pyhdf import HDF, SD, VS from pyhdf.SD import S...
by ASDC - cheyenne.e.land
Fri Jan 12, 2024 7:36 am America/New_York
Forum: Questions/Comments
Question: Screening the CALIPSO aerosol profiles based on CAD score
Replies: 2

Re: Screening the CALIPSO aerosol profiles based on CAD score

Hello,

Thank you for your interest in CALIPSO data.

We're currently working on python code to get you what you need. Thank you for your patience.

Regards,
ASDC
by ASDC - cheyenne.e.land
Mon Dec 18, 2023 10:15 am America/New_York
Forum: Questions/Comments
Question: Create a time series of Monthly Zonal Mean with SAGE III-ISS images
Replies: 0

Create a time series of Monthly Zonal Mean with SAGE III-ISS images

The ASDC now has code in the ASDC_Data_and_User_Services Github that uses SAGE III-ISS' Browse Imagery Service, Quicklook where users can retrieve and create a time series of Monthly Zonal Mean images.

Example:
Image
by ASDC - cheyenne.e.land
Wed Dec 13, 2023 10:36 am America/New_York
Forum: Questions/Comments
Question: Inquiry Regarding CERES_SSF_NOAA-20_Edition1B IWP Data
Replies: 4

Re: Inquiry Regarding CERES_SSF_NOAA-20_Edition1B IWP Data

Hello, A member of the CERES Science team has suggested that to get a total IWP, you should weight each layer’s IWP by the corresponding layer 1 or layer 2 fraction before adding and then dividing by the sum of the two layer fractions. You could use either percentage or fraction as long as you don’t...
by ASDC - cheyenne.e.land
Tue Dec 12, 2023 10:41 am America/New_York
Forum: Questions/Comments
Question: Inquiry Regarding CERES_SSF_NOAA-20_Edition1B IWP Data
Replies: 4

Re: Inquiry Regarding CERES_SSF_NOAA-20_Edition1B IWP Data

Hello, Thank you for your interest in CERES data. According to the SSF Collection Guide on page 117 The lowest cloud layer parameter value is always recorded before the upper layer value. Therefore the values on the left correspond to the lower cloud layer and the values on the right correspond to t...
by ASDC - cheyenne.e.land
Mon Dec 11, 2023 11:59 am America/New_York
Forum: Questions/Comments
Question: Plotting CALIPSO using Python
Replies: 8

Re: Plotting CALIPSO using Python

Hello, Yes, CAL_LID_L2_01kmCLay-ValStage1-V3-41 , is a Legacy product so you will not be able to download any data. We recommend using a current version of this product, CAL_LID_L2_01kmCLay-Standard-V4-51_V4-51 where you can download this data via Direct Data Download . I have also provided the link...