From 16a73ed872a9a4fd9c19077ce37463298d6d6f36 Mon Sep 17 00:00:00 2001
From: AdenKoperczak <awkoperczak@gmail.com>
Date: Fri, 18 Apr 2025 10:59:19 -0400
Subject: [PATCH] Add previous scans for stepping back in time when merging
 level2 files

---
 wxdata/source/scwx/wsr88d/ar2v_file.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/wxdata/source/scwx/wsr88d/ar2v_file.cpp b/wxdata/source/scwx/wsr88d/ar2v_file.cpp
index 6d0e5c02..b4dc6248 100644
--- a/wxdata/source/scwx/wsr88d/ar2v_file.cpp
+++ b/wxdata/source/scwx/wsr88d/ar2v_file.cpp
@@ -568,6 +568,15 @@ Ar2vFile::Ar2vFile(const std::shared_ptr<Ar2vFile>& current,
                continue;
             }
 
+            // Add previous scans for stepping back in time
+            for (auto scan = ++(elevation.second.rbegin());
+                 scan != elevation.second.rend();
+                 ++scan)
+            {
+               p->index_[type.first][elevation.first][scan->first] =
+                  scan->second;
+            }
+
             // Merge this scan with the last one if it is incomplete
             if (IsRadarDataIncomplete(mostRecent->second))
             {