diff --git a/data/prism/prism_B.nc b/data/prism/prism_B.nc
index 8ee252a..2e74d43 100644
Binary files a/data/prism/prism_B.nc and b/data/prism/prism_B.nc differ
diff --git a/data/prism/prism_T.nc b/data/prism/prism_T.nc
index 820f741..ec2a90f 100644
Binary files a/data/prism/prism_T.nc and b/data/prism/prism_T.nc differ
diff --git a/data/prism/prism_V.nc b/data/prism/prism_V.nc
index ea8b5f1..e259520 100644
Binary files a/data/prism/prism_V.nc and b/data/prism/prism_V.nc differ
diff --git a/log.txt b/log.txt
index 66f3810..a8a8fec 100644
--- a/log.txt
+++ b/log.txt
@@ -1,5 +1,5 @@
-tet-file  = data/pipeline/pipeline
-mag-file  = data/pipeline/magz.txt
-site-file = data/pipeline/site.txt
-obs-file  = data/pipeline/pipeline
+tet-file  = data/prism/prism.1
+mag-file  = (0,0,200)
+site-file = -30/30/-30/30/10/81/81
+obs-file  = data/prism/prism
 cal-type  = potential gradient tensor
diff --git a/src/magtet.cpp b/src/magtet.cpp
index ac65d75..500b315 100644
--- a/src/magtet.cpp
+++ b/src/magtet.cpp
@@ -1,10 +1,6 @@
 #include "magtet.h"
 
 
-magtet::magtet(){}
-
-magtet::~magtet(){}
-
 void magtet::read_tet(std::string tet_name)
 {
 	gctl::read_Tetgen_node(tet_name, node_);
@@ -140,7 +136,7 @@ void magtet::cal_tensors()
 			v1 = *ele_[e].fget(i, 1) - *ele_[e].fget(i, 0);
 			v2 = *ele_[e].fget(i, 2) - *ele_[e].fget(i, 0);
 			nf = gctl::cross(v1, v2).normal();
-			// The space is declared by the read_magz() function
+			// The space is declared by the init_magz() function
 			ele_para_[e].fnorm[i] = nf;
 
 			for (int j = 0; j < 3; ++j)
@@ -151,7 +147,7 @@ void magtet::cal_tensors()
 				ele_para_[e].etang[j+i*3] = gctl::cross(nf, ne);
 			}
 
-			ele_para_[e].mag_amp[i] = gctl::dot(magz_[e], ele_para_[e].fnorm[i]);
+			ele_para_[e].mag_amp[i] = gctl::dot(magz_[e], nf);
 		}
 
 		// link magtet_para to tetrahedron's attribute
diff --git a/src/magtet.h b/src/magtet.h
index ad65b09..fac1eec 100644
--- a/src/magtet.h
+++ b/src/magtet.h
@@ -19,6 +19,11 @@
 
 #define RUN_ECHO(action, msg) do {std::clog << msg << "... \n"; action;} while(0);
 
+/**
+ * @brief      计算磁场所需的四面体张量信息与磁化强度
+ * 
+ * 此结构体将连接至四面体元素的att指针上
+ */
 struct magtet_para
 {
 	double mag_amp[4];
@@ -28,9 +33,6 @@ struct magtet_para
 class magtet
 {
 public:
-	magtet();
-	virtual ~magtet();
-
 	void read_tet(std::string tet_name);
 	void init_magz(std::string para);
 	void init_site(std::string para);