From 137840bd5155946c99595f5adafaaf622eff64c2 Mon Sep 17 00:00:00 2001
From: Matt Walsh <github@netbymatt.com>
Date: Wed, 21 Apr 2021 23:05:40 -0500
Subject: [PATCH] correct divide by zero check

---
 README.md                   | 2 +-
 package.json                | 2 +-
 src/packets/utilities/ij.js | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 5035b6a..c3a53e5 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # nexrad-level-3-data
 
-### v0.3.2
+### v0.3.3
 A javascript implementation for decoding Nexrad Level III radar files.
 
 You can find more information on how radar data is encoded at [NOAA](https://www.roc.noaa.gov/WSR88D/BuildInfo/Files.aspx). The work in this project is based mainly on the document [2620001 ICD FOR THE RPG TO CLASS 1 USER - Build 19.0](https://www.roc.noaa.gov/wsr88d/PublicDocs/ICDs/2620001Y.pdf).
diff --git a/package.json b/package.json
index 8628ad3..9551d76 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "nexrad-level-3-data",
-  "version": "0.3.2",
+  "version": "0.3.3",
   "description": "Parsing of NEXRAD level 3 data files",
   "main": "src/index.js",
   "scripts": {
diff --git a/src/packets/utilities/ij.js b/src/packets/utilities/ij.js
index 45717eb..ba42795 100644
--- a/src/packets/utilities/ij.js
+++ b/src/packets/utilities/ij.js
@@ -8,7 +8,7 @@ const ijToAzDeg = (i, j, rawMax = 4096, range = 248, conversion = 1.15078) => {
 	const nm = ((Math.sqrt(i ** 2 + j ** 2) / rawMax) * range) * conversion;
 	let deg = 0;
 	// short circuit potential divide by zero
-	if (i !== j) {
+	if (i === 0) {
 		// calculate degrees, then rotate due to north = up = 0 deg convention
 		deg = (Math.atan(-j / i) * 180) / Math.PI + 90;
 		// coerce to 0<=deg<360