diff --git a/src/apt.h b/src/apt.h
index 2478e9e..a7998e5 100644
--- a/src/apt.h
+++ b/src/apt.h
@@ -81,7 +81,6 @@ typedef int (*apt_getsamples_t)(void *context, float *samples, int count);
 typedef struct {
 	float *prow[APT_MAX_HEIGHT]; // Row buffers
 	int nrow; // Number of rows
-	int zenith; // Row in image where satellite reaches peak elevation
 	apt_channel_t chA, chB; // ID of each channel
 	char name[256]; // Stripped filename
 	char *palette; // Filename of palette
diff --git a/src/dsp.c b/src/dsp.c
index 0bac94e..5821095 100755
--- a/src/dsp.c
+++ b/src/dsp.c
@@ -159,7 +159,6 @@ int apt_getpixelrow(float *pixelv, int nrow, int *zenith, int reset, apt_getsamp
 	static size_t npv;
 	static int synced = 0;
 	static float max = 0.0;
-	static float minDoppler = 1000000000, previous = 0;
 
 	if(reset) synced = 0;
 
@@ -183,14 +182,6 @@ int apt_getpixelrow(float *pixelv, int nrow, int *zenith, int reset, apt_getsamp
 	corr = convolve(&pixelv[1], sync_pattern, SYNC_PATTERN_SIZE - 1);
 	lcorr = convolve(&pixelv[2], sync_pattern, SYNC_PATTERN_SIZE - 2);
 	FreqLine = 1.0+((ecorr-lcorr) / corr / APT_IMG_WIDTH / 4.0);
-
-	float val = fabs(lcorr - ecorr)*0.25 + previous*0.75;
-	if(val < minDoppler && nrow > 10){
-		minDoppler = val;
-		*zenith = nrow;
-	}
-	previous = fabs(lcorr - ecorr);
-
 	// The point in which the pixel offset is recalculated
 	if (corr < 0.75 * max) {
 		synced = 0;
diff --git a/src/main.c b/src/main.c
index 51d91a4..0701c5a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -172,7 +172,7 @@ static int processAudio(char *filename, options_t *opts){
 			img.prow[img.nrow] = (float *) malloc(sizeof(float) * APT_PROW_WIDTH);
 
 			// Write into memory and break the loop when there are no more samples to read
-			if (apt_getpixelrow(img.prow[img.nrow], img.nrow, &img.zenith, (img.nrow == 0), getsamples, NULL) == 0)
+			if (apt_getpixelrow(img.prow[img.nrow], img.nrow, NULL, (img.nrow == 0), getsamples, NULL) == 0)
 				break;
 
 			if(opts->realtime) pushRow(img.prow[img.nrow], APT_IMG_WIDTH);
@@ -197,7 +197,7 @@ static int processAudio(char *filename, options_t *opts){
 
 	// Crop noise from start and end of image
 	if(CONTAINS(opts->effects, Crop_Noise)){
-		img.zenith -= apt_cropNoise(&img);
+		apt_cropNoise(&img);
 	}
 
 	// Denoise