improve awon download filenames

app/controllers/awon_controller.rb

@@ -79,10 +79,14 @@ def download_data
         render plain: text
       end
       format.csv do
+        filename = begin
+          "#{stn.name} #{@db_class.description} - #{start_date} to #{end_date}.csv"
+        rescue
+          "awon data.csv"
+        end
         text = @db_class.csv_header(use_abbrevs, @ahrs)
         text += @results.collect { |rec| rec.to_csv(@ahrs) }.join("")
-        # render plain: text
-        send_data text, filename: "awon_data.csv"
+        send_data(text, filename:)
       end
     end
   end

app/models/t401.rb

@@ -3,6 +3,10 @@ class T401 < ApplicationRecord
 
   belongs_to :awon_station
 
+  def self.description
+    "Five-Minute Precip and Wind"
+  end
+
   def self.attr_human_readables
     [
       ["date", "Date"],

app/models/t403.rb

@@ -3,6 +3,10 @@ class T403 < ApplicationRecord
 
   belongs_to :awon_station
 
+  def self.description
+    "Pre-2000 Half-Hourly Weather and Soil"
+  end
+
   def self.attr_human_readables
     [
       ["date", "Date"],

app/models/t406.rb

@@ -4,6 +4,10 @@ class T406 < ApplicationRecord
 
   belongs_to :awon_station
 
+  def self.description
+    "Hourly Weather and Soil"
+  end
+
   def self.attr_human_readables
     [
       ["date", "Date"],

app/models/t411.rb

@@ -4,6 +4,10 @@ class T411 < ApplicationRecord
 
   belongs_to :awon_station
 
+  def self.description
+    "Daily Weather"
+  end
+
   def self.attr_human_readables
     [
       ["date", "Date"],

app/models/t412.rb

@@ -4,6 +4,10 @@ class T412 < ApplicationRecord
 
   belongs_to :awon_station
 
+  def self.description
+    "Daily Soil"
+  end
+
   def self.attr_human_readables
     [
       ["date", "Date"],