Add support for Sentinel-2C

doc/platforms_supported.rst

@@ -85,6 +85,9 @@ have been included in Pyspectral.
     * - Sentinel-2B msi
       - `rsr_msi_Sentinel-2B.h5`
       - ESA-Sentinel-MSI_
+    * - Sentinel-2C msi
+      - `rsr_msi_Sentinel-2C.h5`
+      - ESA-Sentinel-MSI_
     * - NOAA-20 viirs
       - `rsr_viirs_NOAA-20.h5`
       - NESDIS_

pyspectral/etc/pyspectral.yaml

@@ -154,10 +154,12 @@ download_from_internet: True
 # Arctica-M-N1-msu-gsa:
 #  path: /path/to/original/Arctica_M_N1_SRF.xlsx
 
-# Sentinel-2A-msi:
-#   path: /path/to/original/sentinel-2a/msi/data/S2-SRF_COPE-GSEG-EOPG-TN-15-0007_3.0.xlsx
-# Sentinel-2B-msi:
-#   path: /path/to/original/sentinel-2b/msi/data/S2-SRF_COPE-GSEG-EOPG-TN-15-0007_3.0.xlsx
+#Sentinel-2A-msi:
+#   path: /path/to/COPE-GSEG-EOPG-TN-15-0007-Sentinel-2_Spectral_Response_Functions_2024-4.0.xlsx
+#Sentinel-2B-msi:
+#   path: /path/to/COPE-GSEG-EOPG-TN-15-0007-Sentinel-2_Spectral_Response_Functions_2024-4.0.xlsx
+#Sentinel-2C-msi:
+#   path: /path/to/COPE-GSEG-EOPG-TN-15-0007-Sentinel-2_Spectral_Response_Functions_2024-4.0.xlsx
 
 # Himawari-8-ahi:
 #   path: /path/to/original/ahi/data

pyspectral/utils.py

@@ -82,6 +82,7 @@
                'EOS-Terra': 'modis',
                'Sentinel-2A': 'msi',
                'Sentinel-2B': 'msi',
+               'Sentinel-2C': 'msi',
                'Arctica-M-N1': 'msu-gsa',
                'Electro-L-N2': 'msu-gs',
                'Sentinel-3A': ['olci', 'slstr'],
@@ -107,10 +108,11 @@
                                      'avhrr-2': 'avhrr/2',
                                      'avhrr-3': 'avhrr/3'}
 
-HTTP_PYSPECTRAL_RSR = "https://zenodo.org/records/12743289/files/pyspectral_rsr_data.tgz"
+HTTP_PYSPECTRAL_RSR = "https://zenodo.org/records/13833977/files/pyspectral_rsr_data.tgz"
 
 RSR_DATA_VERSION_FILENAME = "PYSPECTRAL_RSR_VERSION"
-RSR_DATA_VERSION = "v1.3.2"
+RSR_DATA_VERSION = "v1.4.0"
+
 
 ATM_CORRECTION_LUT_VERSION = {}
 ATM_CORRECTION_LUT_VERSION['antarctic_aerosol'] = {'version': 'v1.0.1',

rsr_convert_scripts/README.rst

@@ -95,8 +95,8 @@ Terra files have names like this: ``rsr.1.oobd.det``
 
    %> python msi_reader.py
 
-The original Sentinel-2 A&B MSI spectral responses. Filenames look like this
-``S2-SRF_COPE-GSEG-EOPG-TN-15-0007_3.0.xlsx``
+The original Sentinel-2 A,B, and C MSI spectral responses. Filenames look like this
+``COPE-GSEG-EOPG-TN-15-0007-Sentinel-2_Spectral_Response_Functions_2024-4.0.xlsx``
 
 .. code::
 

rsr_convert_scripts/msi_reader.py

@@ -29,47 +29,34 @@
 import os
 
 import numpy as np
-from xlrd import open_workbook
+import pandas as pd
 
 from pyspectral.raw_reader import InstrumentRSR
 from pyspectral.utils import convert2hdf5 as tohdf5
 
 LOG = logging.getLogger(__name__)
 
-
-MSI_BAND_NAMES = {}
-MSI_BAND_NAMES['S2A'] = {'S2A_SR_AV_B1': 'B01',
-                         'S2A_SR_AV_B2': 'B02',
-                         'S2A_SR_AV_B3': 'B03',
-                         'S2A_SR_AV_B4': 'B04',
-                         'S2A_SR_AV_B5': 'B05',
-                         'S2A_SR_AV_B6': 'B06',
-                         'S2A_SR_AV_B7': 'B07',
-                         'S2A_SR_AV_B8': 'B08',
-                         'S2A_SR_AV_B8A': 'B8A',
-                         'S2A_SR_AV_B9': 'B09',
-                         'S2A_SR_AV_B10': 'B10',
-                         'S2A_SR_AV_B11': 'B11',
-                         'S2A_SR_AV_B12': 'B12'}
-MSI_BAND_NAMES['S2B'] = {'S2B_SR_AV_B1': 'B01',
-                         'S2B_SR_AV_B2': 'B02',
-                         'S2B_SR_AV_B3': 'B03',
-                         'S2B_SR_AV_B4': 'B04',
-                         'S2B_SR_AV_B5': 'B05',
-                         'S2B_SR_AV_B6': 'B06',
-                         'S2B_SR_AV_B7': 'B07',
-                         'S2B_SR_AV_B8': 'B08',
-                         'S2B_SR_AV_B8A': 'B8A',
-                         'S2B_SR_AV_B9': 'B09',
-                         'S2B_SR_AV_B10': 'B10',
-                         'S2B_SR_AV_B11': 'B11',
-                         'S2B_SR_AV_B12': 'B12'}
-
-SHEET_HEADERS = {'Spectral Responses (S2A)': 'S2A',
-                 'Spectral Responses (S2B)': 'S2B'}
-
-PLATFORM_SHORT_NAME = {'Sentinel-2A': 'S2A',
-                       'Sentinel-2B': 'S2B'}
+MSI_BAND_NAMES = {"B01": "B1",
+                  "B02": "B2",
+                  "B03": "B3",
+                  "B04": "B4",
+                  "B05": "B5",
+                  "B06": "B6",
+                  "B07": "B7",
+                  "B08": "B8",
+                  "B8A": "B8A",
+                  "B09": "B9",
+                  "B10": "B10",
+                  "B11": "B11",
+                  "B12": "B12"}
+
+SHEET_HEADERS = {"S2A": "Spectral Responses (S2A)",
+                 "S2B": "Spectral Responses (S2B)",
+                 "S2C": "Spectral Responses (S2C)"}
+
+PLATFORM_SHORT_NAME = {"Sentinel-2A": "S2A",
+                       "Sentinel-2B": "S2B",
+                       "Sentinel-2C": "S2C"}
 
 
 class MsiRSR(InstrumentRSR):
@@ -79,56 +66,34 @@ def __init__(self, bandname, platform_name):
         """Read the Sentinel-2 MSI relative spectral responses for all channels."""
         super(MsiRSR, self).__init__(bandname, platform_name)
 
-        self.instrument = 'msi'
+        self.instrument = "msi"
+        self.platform_name = platform_name
+        self.short_plat = PLATFORM_SHORT_NAME[platform_name]
         self._get_options_from_config()
 
-        LOG.debug("Filename: %s", str(self.path))
+        LOG.debug(f"Filename: {self.path}")
         if os.path.exists(self.path):
-            self._load()
+            self._load(platform_name)
         else:
-            raise IOError("Couldn't find an existing file for this band: " +
-                          str(self.bandname))
+            raise IOError(f"Couldn't find an existing file for this band: {str(self.bandname)}")
 
     def _load(self, scale=0.001):
         """Load the Sentinel-2 MSI relative spectral responses."""
-        with open_workbook(self.path) as wb_:
-            for sheet in wb_.sheets():
-                if sheet.name not in SHEET_HEADERS.keys():
-                    continue
-
-                plt_short_name = PLATFORM_SHORT_NAME.get(self.platform_name)
-                if plt_short_name != SHEET_HEADERS.get(sheet.name):
-                    continue
-
-                wvl = sheet.col_values(0, 1)
-                for idx in range(1, sheet.row_len(0)):
-                    ch_name = MSI_BAND_NAMES[plt_short_name].get(str(sheet.col_values(idx, 0, 1)[0]))
-                    if ch_name != self.bandname:
-                        continue
+        bname = MSI_BAND_NAMES.get(self.bandname)
+        df = pd.read_excel(self.path, engine='openpyxl', sheet_name=SHEET_HEADERS[self.short_plat])
+        wvl = np.array(df['SR_WL'])
+        resp = np.array(df[f"{self.short_plat}_SR_AV_{bname}"])
 
-                    resp = sheet.col_values(idx, 1)
-                    resp = np.array(resp)
-                    resp = np.where(resp == '', 0, resp).astype('float32')
-                    mask = np.less_equal(resp, 0.00001)
-                    wvl0 = np.ma.masked_array(wvl, mask=mask)
-                    wvl_mask = np.ma.masked_outside(wvl, wvl0.min() - 2, wvl0.max() + 2)
+        mask = np.less_equal(resp, 0.00001)
+        wvl0 = np.ma.masked_array(wvl, mask=mask)
+        wvl_mask = np.ma.masked_outside(wvl, wvl0.min() - 2, wvl0.max() + 2)
 
-                    wvl = wvl_mask.compressed()
-                    resp = np.ma.masked_array(resp, mask=wvl_mask.mask).compressed()
-                    self.rsr = {'wavelength': wvl / 1000., 'response': resp}
-
-                    break
-
-                break
+        wvl = wvl_mask.compressed()
+        resp = np.ma.masked_array(resp, mask=wvl_mask.mask).compressed()
+        self.rsr = {"wavelength": wvl / 1000., "response": resp}
 
 
 if __name__ == "__main__":
-    bands = MSI_BAND_NAMES['S2A'].values()
-    bands.sort()
-    for platform_name in ['Sentinel-2A', ]:
-        tohdf5(MsiRSR, platform_name, bands)
-
-    bands = MSI_BAND_NAMES['S2B'].values()
-    bands.sort()
-    for platform_name in ['Sentinel-2B', ]:
-        tohdf5(MsiRSR, platform_name, bands)
+
+    for plat_name in ["Sentinel-2A", "Sentinel-2B", "Sentinel-2C"]:
+        tohdf5(MsiRSR, plat_name, sorted(MSI_BAND_NAMES))