update to the new CDS-beta (#37)

+ `autoget.pyp`: update url to the new CDS-beta url and API token

+ README: update instructions on 1) how to setup the API with the new personal access token, 2) where to find my token, and 3) where to accept the terms of use

+ dependency: add cdsapi>=0.7.0 version constraint on pyproject.toml and requirements.txt files

+ tests/test_dload.py: update print out website link

---------

Co-authored-by: Zhang Yunjun <yunjunz@outlook.com>

README.md

@@ -7,7 +7,7 @@
 
 ## PyAPS - Python based Atmospheric Phase Screen estimation
 
-This python 3 module estimates differential phase delay maps due to the stratified atmosphere for correcting radar interferograms. It is rewritten in Python 3 language from PYAPS source code and adapted for ECMWF's ERA-5 corrections. 
+This Python 3 module estimates differential phase delay maps due to the stratified atmosphere for correcting radar interferograms. It is rewritten in Python 3 language from PyAPS source code and adapted for ECMWF's ERA-5 corrections.
 
 WARNING: The current version does not work with NARR and MERRA datasets. Contributions are welcomed.
 
@@ -57,21 +57,21 @@ Test the installation by running:
 python PyAPS/tests/test_calc.py
 ```
 
-### 2. Account setup for [ERA5](https://retostauffer.org/code/Download-ERA5/)
+### 2. Account setup for [ERA5](https://www.ecmwf.int/en/forecasts/dataset/ecmwf-reanalysis-v5)
 
-ERA5 data set is redistributed over the Copernicus Climate Data Store (CDS). Registration is required for the data access and downloading.
+ERA5 data set is redistributed over the Copernicus Climate Data Store (CDS)-beta ([migration guide](https://confluence.ecmwf.int/display/CKB/Please+read%3A+CDS+and+ADS+migrating+to+new+infrastructure%3A+Common+Data+Store+%28CDS%29+Engine)). Registration is required for the data access and downloading.
 
-+ [Create a new account](https://cds.climate.copernicus.eu/user/register) on the CDS website if you don't own a user account yet. 
-+ Create the local file `$HOME/.cdsapirc` and add the following two lines:
++ [Create a new account](https://cds-beta.climate.copernicus.eu/) on the CDS-beta website if you don't own a user account yet. Note: the old CDS account won't work.
++ [CDS API setup](https://cds-beta.climate.copernicus.eu/how-to-api#install-the-cds-api-client): Create the local file `$HOME/.cdsapirc` (in your Unix/Linux environment) and add the following two lines:
 
 ```shell
-url: https://cds.climate.copernicus.eu/api/v2
-key: 12345:abcdefghij-134-abcdefgadf-82391b9d3f
+url: https://cds-beta.climate.copernicus.eu/api
+key: your-personal-access-token
 ```
 
-where 12345 is your personal user ID (UID), the part behind the colon is your personal API key. More details can be found [here](https://cds.climate.copernicus.eu/api-how-to). Alternatively, you could edit the `model.cfg` file in the package directory, `site-packages/pyaps3` if installed via conda, and fill in the `[CDS]` section.
+Your Personal Access Token can be found under [Your profile > Personal Access Token](https://cds-beta.climate.copernicus.eu/profile) section or on the [setup guide](https://cds-beta.climate.copernicus.eu/how-to-api#install-the-cds-api-client) page. Alternatively, you could add the token to the `[CDS]` section in `model.cfg` file in the package directory, `site-packages/pyaps3` if installed via conda. Note: using your [old CDS API key](https://cds.climate.copernicus.eu/) will lead to a 401 Client Error and Authentication failed.
 
-+ **Make sure** that you accept the data license in the Terms of use on ECMWF website.
++ **Make sure** that you accept the data license in the Terms of use on ECMWF website: Login, under [Datasets > ERA5 hourly data on pressure levels from 1940 to present > Download > Terms of use](https://cds-beta.climate.copernicus.eu/datasets/reanalysis-era5-pressure-levels?tab=download), click **Accept** to accespt the license to use Copernicus Products.
 
 + Test the account setup by running:
 

pyproject.toml

@@ -22,7 +22,7 @@ classifiers=[
     "Programming Language :: Python :: 3",
 ]
 dependencies = [
-    "cdsapi",
+    "cdsapi>=0.7.0",
     "matplotlib",
     "numpy",
     "pygrib",

requirements.txt

@@ -1,5 +1,5 @@
 # for running
-cdsapi
+cdsapi>=0.7.0
 matplotlib
 numpy
 pygrib
@@ -11,4 +11,4 @@ urllib3
 pip
 setuptools
 setuptools_scm
-wheel
+wheel

src/pyaps3/autoget.py

@@ -48,8 +48,8 @@ def ECMWFdload(bdate,hr,filedir,model='ERA5',datatype='fc',humidity='Q',snwe=Non
         print('WARNING: you are downloading from the old ECMWF platform. '
               'ERA-Interim is deprecated, use ERA-5 instead.')
     if model in 'ERA5':
-        print('INFO: You are using the latest ECMWF platform for downloading datasets: '
-              'https://cds.climate.copernicus.eu/api/v2')
+        cds_url = 'https://cds-beta.climate.copernicus.eu/api'
+        print('INFO: You are using the latest ECMWF platform for downloading datasets: ', cds_url)
 
     #-------------------------------------------
     # Define parameters
@@ -91,14 +91,14 @@ def ECMWFdload(bdate,hr,filedir,model='ERA5',datatype='fc',humidity='Q',snwe=Non
         fname = flist[i]
 
         #-------------------------------------------
-        # CASE 1: request for CDS API client (new ECMWF platform, for ERA5)    
+        # CASE 1: request for CDS API client (new ECMWF platform, for ERA5)
         if model in 'ERA5':
             # Contact the server
             rc_file = os.path.expanduser('~/.cdsapirc')
             if os.path.isfile(rc_file):
                 c = cdsapi.Client()
             else:
-                url = 'https://cds.climate.copernicus.eu/api/v2'
+                url = cds_url
                 key = config.get('CDS', 'key')
                 c = cdsapi.Client(url=url, key=key)
 
@@ -206,7 +206,7 @@ def MERRAdload(bdate,hr,filedir, hdf=False):
         else:
             weburl = '%s%s%s%s%s%s%s%s%s%s%s%s%s' %(url1,yr,url2,mon,url3n,date,url4,hr,url5,hr,url6n,date,url7)
         dir = '%s' %(filename)
-                
+
         if not os.path.exists(dir):
             #urllib3.urlretrieve(weburl,dir)
             dloadCmd = 'wget "{}" --user {} --password {} -O {}'.format(weburl, user, pw, filename)
@@ -222,7 +222,7 @@ def NARRdload(bdate,hr,filedir):
         os.makedirs(filedir)
         print('create foler: {}'.format(filedir))
 
-    flist = []      
+    flist = []
     for i, day in enumerate(bdate):
         webdir = day[0:6]
         fname = 'narr-a_221_%s_%s00_000.grb'%(day,hr)

src/pyaps3/model.cfg

@@ -3,19 +3,19 @@
 #Get it from https://retostauffer.org/code/Download-ERA5/
 #for ERA5
 [CDS]
-key = your-uid:your-api-key
+key = your-personal-access-token
 
 #####The key to the new server for ECMWF
-#Get it from https://software.ecmwf.int/wiki/display/WEBAPI/Accessing+ECMWF+data+servers+in+batch 
+#Get it from https://software.ecmwf.int/wiki/display/WEBAPI/Accessing+ECMWF+data+servers+in+batch
 #for ERA-Interim [outdated]
 [ECMWF]
 email = the-email-address-used-as-login@ecmwf-website.org
-key = 
+key =
 
 #####Passwd and key for download from ucar
 [ERA]
 email = the-email-adress-used-as-login@ucar-website.org
-key = 
+key =
 
 #####No username/password is required for NARR
 [NARR]

tests/test_dload.py

@@ -8,8 +8,8 @@
 print('import pyaps3 from {}'.format(pa.__file__))
 print('------------------------------------------------')
 print('test ERA5 data download')
-print('NOTE: Account setup is required on the Copernicus Climate Data Store (CDS).')
-print('      More detailed info can be found on: https://retostauffer.org/code/Download-ERA5/')
+print('NOTE: Account setup is required on the Copernicus Climate Data Store (CDS)-beta.')
+print('      More detailed info can be found on: https://cds-beta.climate.copernicus.eu/how-to-api')
 print('      Add your account info to ~/.cdsapirc file.')
 filedir = os.path.join(os.path.dirname(__file__), 'data', 'ERA5')
 pa.ECMWFdload(['20200601','20200901'], hr='14', filedir=filedir, model='ERA5', snwe=(30,40,120,140))