extend available polarisation channels (#518)

* extend available polarisation channels

eoxserver/resources/coverages/migrations/0010_polarisation_channels_expand.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2.17 on 2022-03-16 16:29
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('coverages', '0009_begin_time_end_time_index'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='productmetadata',
+            name='polarization_channels',
+            field=models.PositiveSmallIntegerField(blank=True, choices=[(0, 'HV'), (1, 'HV, VH'), (2, 'VH'), (3, 'VV'), (4, 'HH, VV'), (5, 'HH, VH'), (6, 'HH, HV'), (7, 'VH, VV'), (8, 'VH, HV'), (9, 'VV, HV'), (10, 'VV, VH'), (11, 'HH'), (12, 'HH, HV, VH, VV'), (13, 'UNDEFINED'), (14, 'HH, VH, HV, VV'), (15, 'HH, VV, HV, VH'), (16, 'HH, VV, VH, HV')], db_index=True, null=True),
+        ),
+    ]

eoxserver/resources/coverages/models.py

@@ -624,6 +624,9 @@ class ProductMetadata(models.Model):
         (11, "HH"),
         (12, "HH, HV, VH, VV"),
         (13, "UNDEFINED"),
+        (14, "HH, VH, HV, VV"),
+        (15, "HH, VV, HV, VH"),
+        (16, "HH, VV, VH, HV"),
     )
 
     ANTENNA_LOOK_DIRECTION_CHOICES = (