From 4b9fa64aeb12390631189f8663db31097df228e5 Mon Sep 17 00:00:00 2001
From: accius <chris@cjhlighting.com>
Date: Sun, 1 Feb 2026 00:27:20 -0500
Subject: [PATCH] adding ant files

---
 iturhfprop-service/Dockerfile | 12 ++++++++++++
 iturhfprop-service/server.js  |  6 +++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/iturhfprop-service/Dockerfile b/iturhfprop-service/Dockerfile
index 0952447..5fd64e9 100644
--- a/iturhfprop-service/Dockerfile
+++ b/iturhfprop-service/Dockerfile
@@ -56,6 +56,18 @@ RUN mkdir -p /opt/iturhfprop/Data \
 # Cleanup
 RUN rm -rf ITU-R-HF-14.3 source.tar.gz
 
+# Create Isotropic antenna file (Type 13 format)
+# Format: Name, Type, Frequency(MHz), then elevation/gain pairs
+RUN printf 'Isotropic\n' > /opt/iturhfprop/Data/Isotropic.ant \
+    && printf '13\n' >> /opt/iturhfprop/Data/Isotropic.ant \
+    && printf '14.0\n' >> /opt/iturhfprop/Data/Isotropic.ant \
+    && printf '37\n' >> /opt/iturhfprop/Data/Isotropic.ant \
+    && for i in $(seq 0 5 180); do printf '%d 0.0\n' $i >> /opt/iturhfprop/Data/Isotropic.ant; done \
+    && echo "=== Created Isotropic.ant ===" \
+    && cat /opt/iturhfprop/Data/Isotropic.ant \
+    && echo "=== Final file count ===" \
+    && ls /opt/iturhfprop/Data/ | wc -l
+
 # Set library path so ITURHFProp can find shared libs
 ENV LD_LIBRARY_PATH=/opt/iturhfprop:$LD_LIBRARY_PATH
 
diff --git a/iturhfprop-service/server.js b/iturhfprop-service/server.js
index 073e7ab..01dd495 100644
--- a/iturhfprop-service/server.js
+++ b/iturhfprop-service/server.js
@@ -77,7 +77,7 @@ function generateInputFile(params) {
   // Format frequencies
   const freqList = frequencies.map(f => f.toFixed(3)).join(' ');
   
-  // ITURHFProp input file format - minimal version without external antenna files
+  // ITURHFProp input file format
   const input = `PathName "OpenHamClock"
 Path.L_tx.lat ${txLat.toFixed(4)}
 Path.L_tx.lng ${txLon.toFixed(4)}
@@ -95,6 +95,8 @@ Path.Relr ${requiredReliability}
 Path.ManMadeNoise ${manMadeNoise}
 Path.Modulation ANALOG
 Path.SorL SHORTPATH
+TXAntFilePath "${ITURHFPROP_DATA}/Data/Isotropic.ant"
+RXAntFilePath "${ITURHFPROP_DATA}/Data/Isotropic.ant"
 DataFilePath "${ITURHFPROP_DATA}/Data/"
 `;
 
@@ -380,6 +382,8 @@ Path.Relr 90
 Path.ManMadeNoise RESIDENTIAL
 Path.Modulation ANALOG
 Path.SorL SHORTPATH
+TXAntFilePath "${ITURHFPROP_DATA}/Data/Isotropic.ant"
+RXAntFilePath "${ITURHFPROP_DATA}/Data/Isotropic.ant"
 DataFilePath "${ITURHFPROP_DATA}/Data/"
 `;
     fs.writeFileSync('/tmp/test_input.txt', testInput);