ionex data is actually predictions 1 day ahead so get the current day not just the last one in the file list

README.md

@@ -54,3 +54,5 @@ Unit: `(10^16 el) / m^2`
 VTEC, or Vertical TEC, is a specific type of TEC measurement that is taken along a path extending
 vertically from the Earth's surface to the edge of the atmosphere. So essentially, VTEC is a subset of TEC, with the
 difference lying in the specific path along which the measurement is taken.
+
+Updated hourly.

lib/cddis_fetch.py

@@ -1,4 +1,5 @@
 import datetime
+import logging
 import subprocess
 import sys
 import tempfile
@@ -43,7 +44,9 @@ def fetch_latest_ionex(username: str, password: str):
     day_urls = [element.get_attribute('href') for element in day_elements]
 
     # Load the latest day.
-    driver.get(day_urls[-1])
+    today_url = day_urls[-2]  # last element is predictions for tomorrow so we want the second to last one
+    logging.info(f'Using day {today_url.split("/")[-1]}')
+    driver.get(today_url)
 
     # Find our file.
     file_elements = driver.find_elements(By.XPATH, '//a[@class="archiveItemText"]')

main.py

@@ -2,12 +2,13 @@ import logging
 import os
 import sys
 import time
+from datetime import datetime
 
 import numpy as np
 import paho.mqtt.client as mqtt
 
 from lib.cddis_fetch import fetch_latest_ionex
-from lib.tecmap import get_tecmaps, plot_tec_map
+from lib.tecmap import get_tecmaps, plot_tec_map, parse_ionex_datetime
 
 logging.basicConfig(level=logging.INFO)
 
@@ -35,7 +36,6 @@ if not CDDIS_USERNAME or not CDDIS_PASSWORD:
 client = mqtt.Client(client_id=MQTT_CLIENT_ID)
 if MQTT_USERNAME and MQTT_PASSWORD:
     client.username_pw_set(MQTT_USERNAME, MQTT_PASSWORD)
-    logging.info("Username and password set.")
 client.will_set(MQTT_TOPIC_PREFIX + "/status", payload="Offline", qos=1, retain=True)  # set LWT
 client.connect(MQTT_BROKER_HOST, port=MQTT_BROKER_PORT)
 client.loop_start()
@@ -48,18 +48,23 @@ def publish(topic: str, msg):
     if status == 0:
         logging.info(f"Sent {msg} to topic {topic_expanded}")
     else:
-        logging.error(f"Failed to send message to topic {topic_expanded}")
+        logging.error(f"Failed to send message to topic {topic_expanded}: {result}")
 
 
 def main():
     while True:
+        # TODO: tick every second and execute runs if it's time.
+        # TODO: get TEC map every 15 min and serve from URL https://services.swpc.noaa.gov/images/animations/natec-ustec/ustec_tec/latest.png?time=1716232652000
+        utc_hr = datetime.utcnow().hour
         logging.info('Fetching latest IONEX data')
+        logging.info(f'Using hour {utc_hr}')
         ionex_data = fetch_latest_ionex(CDDIS_USERNAME, CDDIS_PASSWORD)
-        tec_data = []
+        avg_tec = None
         for tecmap, epoch in get_tecmaps(ionex_data):
+            if parse_ionex_datetime(epoch).hour == utc_hr:
                 avg_tec = np.mean(plot_tec_map(tecmap, [float(LON_RANGE_MIN), float(LON_RANGE_MAX)], [float(LAT_RANGE_MIN), float(LAT_RANGE_MAX)]))
-            tec_data.append(avg_tec)
+                break
-        latest = round(tec_data[-1], 1)
+        latest = round(avg_tec, 1)
         publish('vtec', latest)
         time.sleep(1800)