diff --git a/core.py b/core.py
index edf8691..7ad9a0d 100644
--- a/core.py
+++ b/core.py
@@ -444,7 +444,11 @@ def tangent_line_k(line_x, line_y, center_x, center_y, radius, init_k=10.0):
 
 
 def func_ng(td):  # 地闪密度，通过雷暴日计算
-    return 0.023 * (td ** 1.3)
+    if para.ng > 0:
+        r = para.ng
+    else:
+        r = 0.023 * (td ** 1.3)
+    return r
 
 
 # 圆和地面线的交点，只去正x轴上的。
diff --git a/metadata.yml b/metadata.yml
index 6ea90f2..33c60ec 100644
--- a/metadata.yml
+++ b/metadata.yml
@@ -1,4 +1,4 @@
-Version: 1.2.0
+Version: 1.2.0.2
 #CompanyName: My Imaginary Company
 #FileDescription: Simple App
 #InternalName: Simple App