diff --git a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/bd/Gga.java b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/bd/Gga.java
index 2cf1e801..93d55cb2 100644
--- a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/bd/Gga.java
+++ b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/bd/Gga.java
@@ -51,13 +51,8 @@ public class Gga {
             byte d0 = data.getByte(pos);
             byte d1 = data.getByte(pos+1);
             if(GGA_FLAG[0] == d0){
-                if(data.readableBytes()>5 &&
-                        data.getByte(pos+3) == GGA_FLAG[3] &&
-                        data.getByte(pos+4) == GGA_FLAG[4] &&
-                        data.getByte(pos+5) == GGA_FLAG[5]) {
-                    found = true;
-                    break;
-                }
+                found = true;
+                break;
             }
             else if(d0 == rtcm_flag){
                 if(d1 == 0x31) { // d331粘包