From 622d721a771cbe31eba8291570d9fce78a46bd61 Mon Sep 17 00:00:00 2001
From: wyc <1104749580@qq.com>
Date: Fri, 17 Jul 2026 13:52:10 +0800
Subject: [PATCH] =?UTF-8?q?=E9=A6=96=E4=B8=AA=E7=82=B9=E5=BC=82=E5=B8=B8?=
 =?UTF-8?q?=E4=BD=8D=E7=BD=AE=E5=89=94=E9=99=A4?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 SSR/ADS_B/ADS_B.hpp   |  1 +
 SSR/Aircraft_Info.cpp | 19 +++++++++++++++----
 SSR/export.hpp        |  6 ++++--
 3 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/SSR/ADS_B/ADS_B.hpp b/SSR/ADS_B/ADS_B.hpp
index 3498737..2f9442f 100644
--- a/SSR/ADS_B/ADS_B.hpp
+++ b/SSR/ADS_B/ADS_B.hpp
@@ -82,6 +82,7 @@ struct Constraint {
     bool time_space_filter;
     bool speed_filter;
     bool use_system_time;
+    mutable bool fail_clear_pos = false; // 如果启用那么解码位置失败，将会清空状态
 };
 template <typename That>
 struct CPR_MSG : CPR_Data {
diff --git a/SSR/Aircraft_Info.cpp b/SSR/Aircraft_Info.cpp
index b17813f..adcbc79 100644
--- a/SSR/Aircraft_Info.cpp
+++ b/SSR/Aircraft_Info.cpp
@@ -119,16 +119,21 @@ bool parse_absb_17(SSR::Data_Source_Interface* src, SSR::P_S mode_s_msg, JSON& m
         Parse_no_json(t, BDS06_surface_position)
         info.refresh_pos(true);
         t.base_station_pos = base_station_pos;
-        //bool use_system_time = src->use_system_time.load();
+        auto& constraint = surface_constraint;
+        auto& list = info.surface_pos_track_list;
+        constraint.fail_clear_pos = list.size() <= 1;
         auto tp = t.parse_message(mode_s_msg, air_constraint);
         if (tp.has_value()) {
             auto t2 = t.odd_msg;
             Position_Info p(tp.value(), info.altitude_meter().value_or(0));
-            info.surface_pos_track_list.push(p);
+            list.push(p);
             info.mlat = false;
             parse_pos_call_back(&info, mode_s_msg, true);
             msg_json.append_list(t.toJson().children);
         }
+        else if (constraint.fail_clear_pos) {
+            list.reset();
+        }
         msg_json.append(Psc::JSON("地表位置消息", get_current_time_as_string()));
     }
     else if ((tc >= 9 && tc <= 18) || (tc >= 20 && tc <= 22)) {
@@ -140,16 +145,22 @@ bool parse_absb_17(SSR::Data_Source_Interface* src, SSR::P_S mode_s_msg, JSON& m
         else if (info.absb_version == 2) {
             Parse(t2, BDS05_airborne_Position_v2)
         }
+        auto& constraint = air_constraint;
+        auto& list = info.air_pos_track_list;
+        constraint.fail_clear_pos = list.size() <= 1;
         using namespace std::chrono;
-        auto tp = t.parse_message(mode_s_msg, surface_constraint);
+        auto tp = t.parse_message(mode_s_msg, constraint);
         if (tp.has_value()) {
             auto alt = t.get_alt_meter();
             Position_Info p(tp.value(), alt);
-            info.air_pos_track_list.push(p);
+            list.push(p);
             info.mlat = false;
             parse_pos_call_back(&info, mode_s_msg, false);
             msg_json.append_list(t.toJson().children);
         }
+        else if (constraint.fail_clear_pos) {
+            list.reset();
+        }
         msg_json.append(Psc::JSON("空中位置消息", get_current_time_as_string()));
     }
     else if (tc == 19) {
diff --git a/SSR/export.hpp b/SSR/export.hpp
index cefc041..a77e10c 100644
--- a/SSR/export.hpp
+++ b/SSR/export.hpp
@@ -185,8 +185,10 @@ RET<Pos_Ret> CPR_MSG<That>::parse_message(P_S msg, Constraint constraint) {
         return ret;
     }
     // 此时新来的点本地解码失败 全局解码也失败 很可能是 中间丢了很多消息 所以旧的pos
-    // last_parse_pos_time = 0;
-    // pos = std::nullopt;
+    if (constraint.fail_clear_pos) {
+        last_parse_pos_time = 0;
+        last_parse_pos = std::nullopt;
+    }
     that->msg = msg;
     that->time = time_s;
     other->reset();