Handle log files with no SOH data

sohstationviewer/model/reftek_data/reftek_reader/log_file_reader.py

@@ -267,6 +267,9 @@ class LogFileReader:
                 # used to generate the file.
                 if split_packet_header[0] not in possible_programs:
                     self.station_code = split_packet_header[-1]
+            if self.station_code is None and eh_et_lines:
+                # Each event info line stores the station code as second word
+                self.station_code = eh_et_lines[0].split()[1]
             if self.experiment_number is None and soh_lines:
                 found_experiment_number = get_experiment_number(soh_lines)
                 self.experiment_number = found_experiment_number
@@ -277,6 +280,10 @@ class LogFileReader:
             # separate the SOH lines blocks during processing.
             self.soh_lines.append('\n')
             self.masspos_lines.extend(masspos_lines)
+        # In cases where there is no SOH data, we are going to assume that the
+        # experiment number is 0.
+        if self.experiment_number is None:
+            self.experiment_number = '0'
 
 
 def process_mass_poss_line(masspos_lines: List[str]