Add segy sub-version for Silixa Carina

d-chambers · d-chambers · commit a4d8b9dc09d0 · 2025-08-23T14:18:27.000+01:00
diff --git a/dascore/io/segy/core.py b/dascore/io/segy/core.py
@@ -97,6 +97,16 @@ class SegyV0_0(SegyV1_0):  # noqa
     version = "0.0"
 
 
+class SegyV0_1(SegyV1_0):  # noqa
+    """
+    An IO class supporting version 0.100 of the SEGY format.
+
+    This odd version is output by some Silixa files.
+    """
+
+    version = "0.100"
+
+
 class SegyV2_0(SegyV1_0):  # noqa
     """An IO class supporting version 2.0 of the SEGY format."""
 
diff --git a/dascore/io/segy/utils.py b/dascore/io/segy/utils.py
@@ -35,7 +35,7 @@ def _get_segy_version(fp):
     Based on ObsPy's implementation writen by Lion Krischer.
     https://github.com/obspy/obspy/blob/master/obspy/io/segy/core.py
     """
-    # # Read 400byte header into byte string.
+    # Read 400byte header into byte string.
     fp.seek(3200)
     header = fp.read(400)
     data_trace_count = twos_comp(header[12:14])
@@ -60,11 +60,12 @@ def _get_segy_version(fp):
         # Sanity checks for other values.
         data_trace_count >= 0,
         auxiliary_trace_count >= 0,
-        format_number_minor in {0, 1, 2, 3},
+        format_number_minor in {0, 1, 2, 3, 100},
         fixed_len_flag in {0, 1},
     )
     if all(checks):
-        return "segy", f"{format_number_major}.{format_number_minor}"
+        version = f"{format_number_major}.{format_number_minor}"
+        return "segy", version
     else:
         return False
 
diff --git a/pyproject.toml b/pyproject.toml
@@ -120,6 +120,8 @@ TERRA15__V4 = "dascore.io.terra15.core:Terra15FormatterV4"
 TERRA15__V5 = "dascore.io.terra15.core:Terra15FormatterV5"
 TERRA15__V6 = "dascore.io.terra15.core:Terra15FormatterV6"
 SILIXA_H5__V1 = "dascore.io.silixah5:SilixaH5V1"
+SEGY__V0_0 = "dascore.io.segy.core:SegyV0_0"
+SEGY__V0_100 = "dascore.io.segy.core:SegyV0_100"
 SEGY__V1_0 = "dascore.io.segy.core:SegyV1_0"
 SEGY__V2_0 = "dascore.io.segy.core:SegyV2_0"
 SEGY__V2_1 = "dascore.io.segy.core:SegyV2_1"
