diff --git a/php/classes/FilesMgr.php b/php/classes/FilesMgr.php
index 1f1d756..a275bfd 100644
--- a/php/classes/FilesMgr.php
+++ b/php/classes/FilesMgr.php
@@ -120,15 +120,21 @@ class FilesMgr extends AmdaObjectMgr
 		return array('type' => $data_type, 'size' => $size, 'n_records' => $n_recs, 'units' => $units, 'fillvalue' => $fillval);
 	}
 
-	public function getCdfSampling() 
-	{
+	public function getCdfSampling() {
 		copy($this->fileName, "temp.cdf");         
 		exec('cdfsamplingfromdata ', $results);
 		unlink("temp.cdf");
 
 		return $results;
 	}
+	
+	public function getCdfSamplings() {
+		copy($this->fileName, "temp.cdf");         
+		exec('cdfsamplingsfromdata ', $results);
+		unlink("temp.cdf");
 
+		return $results;
+	}
 /*
 *       CEF format processing
 */
@@ -594,22 +600,30 @@ class FilesMgr extends AmdaObjectMgr
 	}
 
 
-	protected function createFile($format) 
+	protected function createFile($format, $samplingType) 
 	{              
 		$newFile = $this->contentDom->createElement('file');
 		$newFile->setAttribute('xml:id', $this->fileId);
 		$newFile->setAttribute('name', $this->fileId);
 		$newFile->setAttribute('format', $format);
-
+		
+		$minSamp = $this->sampling;
+		$maxSamp = $this->maxSampling;
+		
 		switch ($format)
 		{
 			case "cdf":  
 					$start_stop = explode(" ",$this->getCdfStartStop());
-					$result = $this->getCdfSampling();
-					//TODO process errors
-					$minSamp = $result[count($result)-1];
-					//TODO if min & max
-					$maxSamp =  $minSamp;
+					if ($minSamp < 0) {
+						if ($samplingType == 'constant') {
+							$result = $this->getCdfSampling();
+							//TODO process errors
+							$minSamp = $result[count($result)-1];
+							$maxSamp =  $minSamp;
+						} else {
+							// $result = $this->getCdfSamplings();
+						}
+					}
 				break;            
 			case "txt":   
 					$start_stop =  explode(" ",$this->reformatTxt());
@@ -621,16 +635,14 @@ class FilesMgr extends AmdaObjectMgr
 					// Test if 'standard' meta exist in CEF
 					$cefMetaTest = $this->getCefStartStop(); 
 
-					if ($cefMetaTest != -1) 
-					{
+					if ($cefMetaTest != -1) {
 						$cefStartStop = explode("/",$cefMetaTest); 
 						$start_stop[] = strtotime($cefStartStop[0]);
 						$start_stop[] = strtotime($cefStartStop[1]); 			   
 						$result = $this->getCefSampling();
 						$minSamp = $result[count($result)-1];
 					}
-					else 
-					{
+					else {
 						// no META data - so time processing
 						$timeInfo = $this->getCefTimeInfo();
 						$timeInfoArr = explode(" ", $timeInfo);
@@ -644,8 +656,10 @@ class FilesMgr extends AmdaObjectMgr
 			case "vot" :
 					$start_stop = explode(" ",$this->getVotFileMgr()->getStartStop());
 					$samplings = $this->getVotFileMgr()->getSamplings();
-					$minSamp = $samplings["minSampling"];
-					$maxSamp = $samplings["maxSampling"];
+					if ($minSamp < 0) { 
+						$minSamp = $samplings["minSampling"];
+						$maxSamp = $samplings["maxSampling"];
+					}
 					$desc = $this->getVotFileMgr()->getDescription();
 				break;  
 			case "nc":  
@@ -655,11 +669,13 @@ class FilesMgr extends AmdaObjectMgr
 							return $ncInfo;
 					}
 					$ncInfoArr = explode("#",$ncInfo);
-					$start_stop = explode(":",$ncInfoArr[0]);			   
-					//TODO process errors
-					$minSamp = $ncInfoArr[1];
-					//TODO if min & max
-					$maxSamp =  $minSamp;
+					$start_stop = explode(":",$ncInfoArr[0]);
+					if ($minSamp < 0) {
+						//TODO process errors
+						$minSamp = $ncInfoArr[1];
+						//TODO if min & max
+						$maxSamp =  $minSamp;
+					}
 				break;   
 			default: 
 		}
@@ -1128,20 +1144,27 @@ class FilesMgr extends AmdaObjectMgr
 
 		$format = $this->getFormat();
 
-		if ($format === 'unknown')
-		{ 	           
+		if ($format === 'unknown') { 	           
 			unlink($this->fileName);                   
 			return array('success' => false, 'error' => 'Sorry, unknown format of '.$fileName);	
 		}
 
+		// if sampling is defined by user
+		if ($formats["samplingType"] == "manual") {
+			$this->sampling = $formats["min_sampling"];
+			if ($formats["max_sampling"])
+				$this->maxSampling = $formats["max_sampling"];
+			else
+				$this->maxSampling = $this->sampling;
+		}
+		
+		
 		if ($format == 'txt') 
 		{  
-			if ($formats["timeFormat"] == "user") 
-			{
+			if ($formats["timeFormat"] == "user") {
 				$res =  $this->reformatTime($formats["nonStandard"], $formats["timeLength"], $formats["doy"]);
 
-				if (!$res) 
-				{
+				if (!$res) {
 					unlink($this->fileName); 
 					return array('success' => false, 'error' => 'can\'t reformat time'); 
 				}
@@ -1149,60 +1172,54 @@ class FilesMgr extends AmdaObjectMgr
 			// check if file is not empty
 			$vars = $this->getTxtColNumber(false);
 
-			if ($vars == -100) 
-			{
+			if ($vars == -100) {
 					return array('success' => false, 'error' => 'no such file');
 			}
 			
-			if ($vars == -1)
-			{ 
+			if ($vars == -1) { 
 					unlink($this->fileName); 
 					return array('success' => false, 'error' => 'while reading file');
 			}
 
-			if ($vars === 0) 
-			{
+			if ($vars === 0) {
 					unlink($this->fileName);
 					return array('success' => false, 'error' => 'file contains no data');
 			}
+			
+			// sampling is to be defined automatically
+			if ($this->sampling < 0) {
+				if ($formats["timeSampling"] == "constant") {          
+					$this->sampling = $this->getTxtSampling();	 
+					$this->maxSampling = $this->sampling;
+				}
+				else {
+					$samplings = $this->getTxtSamplings();
+					$this->sampling = $samplings[0];
+					$this->maxSampling = $samplings[1];
+				}
 
-			if ($formats["timeSampling"] == "constant") 
-			{          
-				$this->sampling = $this->getTxtSampling();	 
-				$this->maxSampling = $this->sampling;
-			}
-			else 
-			{
-				$samplings = $this->getTxtSamplings();
-				$this->sampling = $samplings[0];
-				$this->maxSampling = $samplings[1];
+				if ($this->sampling <= 0) {  
+						unlink($this->fileName); 
+						if ($this->sampling == -10) {
+								return array('success' => false, 'error' => 'Sorry, can\'t process'.$fileName.PHP_EOL.'. Check if there are non numeric chars in the data');
+						}
+						return array('success' => false, 'error' => 'Sorry, can\'t process Time for '.$fileName.PHP_EOL.'. Check time format, start time (> 1970-01-01) or sampling time (>= 1s)');		           
+				}
 			}
-
-			if ($this->sampling <= 0) 
-			{  
-					unlink($this->fileName); 
-					if ($this->sampling == -10) 
-					{
-							return array('success' => false, 'error' => 'Sorry, can\'t process'.$fileName.PHP_EOL.'. Check if there are non numeric chars in the data');
-					}
-					return array('success' => false, 'error' => 'Sorry, can\'t process Time for '.$fileName.PHP_EOL.'. Check time format, start time (> 1970-01-01) or sampling time (>= 1s)');		           
-			}              
 		}
 
 		if ($format == 'nc')
 		{  
 			$status = $this->reformatNcTime();
-			if ($status <= 0) 
-			{
+			if ($status <= 0) {
 				unlink($this->fileName);
 				return array('success' => false, 'error' => 'error '.$timeFormat.PHP_EOL.'Time Format problem');	
 			}
 		}
 
 		//create new file tag with all attributes and add it to the content DOM   
-		$newFile = $this->createFile($format);
-		if (is_int($newFile) && ($newFile < 0)) 
-		{ 
+		$newFile = $this->createFile($format, $formats["timeSampling"]);
+		if (is_int($newFile) && ($newFile < 0)) { 
 			unlink($this->fileName);
 			return array( 'success' => false, 'file' => $fileName);
 		}
@@ -1218,8 +1235,8 @@ class FilesMgr extends AmdaObjectMgr
 				$mask->appendChild($newFile);
 				
 				$files = $mask->getElementsByTagName("file");
-				foreach ($files as $file) 
-				{
+				
+				foreach ($files as $file) {
 					$starts[] = $file->getAttribute("start");
 					$stops[] =  $file->getAttribute("stop");
 				}
@@ -1230,8 +1247,7 @@ class FilesMgr extends AmdaObjectMgr
 			}	
 		}                     
 		// no corresponding masks => add to fileList      
-		if (!$isMask)
-		{					  
+		if (!$isMask) {					  
 			$filesList = $this->contentDom->getElementById($this->contentRootId); 
 			$filesList->appendChild($newFile);
 		}        
@@ -1241,8 +1257,7 @@ class FilesMgr extends AmdaObjectMgr
 		//if mask exists - add to data base
 		$myBaseManager = new BaseManager();
 		$mask = $myBaseManager->addFile($fileName); 
-		if ($mask != null) 
-		{
+		if ($mask != null) {
 			$startstop = $myBaseManager->getStartStop($myBaseManager->getVi($mask));
 			$myParamMgr = new DerivedParamMgr('myDataParam');
 			$myParamMgr->updateMydata($mask,$startstop);      
diff --git a/php/src/cdfsamplingfromdata.c b/php/src/cdfsamplingfromdata.c
index e804d6d..66261e2 100644
--- a/php/src/cdfsamplingfromdata.c
+++ b/php/src/cdfsamplingfromdata.c
@@ -1,8 +1,5 @@
-/* $Id: timeResFromData.c,v 1.1 2010/08/31 10:32:55 budnik Exp $ */
+/* $Id: cdf constant samplig from data $ */
 
-/** @file timeResFromData.c
-*   @brief Function to get CDAWEB dataset sampling times from data files
-*/
 #include <stdio.h>
 #include <stdlib.h>
 #include <cdf.h>
@@ -46,48 +43,18 @@ void cdf_handle_error(CDFstatus status)
 	exit(1);
 }
 
-void find_min(int* delta, int nRecs, int minFalse, int* minVal)
-{
-	int i, n, min;
-
-	n = 1;
-	i = 0;
-	while (abs(delta[i]) <= minFalse) i++;
-	if (i < nRecs) {
-		min = abs(delta[i]); 
-		// printf(" first MIN %d \n", min);
-		for (i = 1; i < nRecs; i++) {
-			//   printf(" delta %d \n", delta[i]);
-			if (delta[i] == min) n++;
-			if (delta[i] < min && delta[i] > minFalse) {
-					min = delta[i];
-					n = 1;
-			}
-		}
-	} else {
-		min = -10;
-		n = nRecs;
-	}
-	
-	minVal[0] = min;
-	minVal[1] = n; 
-	printf(" MIN %d %d\n", min, n);
-}
-
 int main(int argc, char *argv[])
 {
-	long RecStart = 0, RecCount, RecInt = 1;
+	long RecStart = 0, RecCount = 2, RecInt = 1;
 	long indices[1] = {0}, intervals[1] = {1}, counts[1] = {1};
 	long varN = -1;  
 	long datatype = 0, attrN, maxEntry;
 	CDFstatus   cstatus;           // CDF status code
 	CDFid id;
 	double *value;
-	int *delta;
 	int i, minFalse = 0, numEnough;
-	int min[2] = {0, 0};
 	char attrValue[300];
-	float Sampling;
+	int sampling;
 	double epoch16[2], dbl_value, dbl_value_;
 	long year, month, day, hour, minute, sec, msec, mksec, nsec, psec; 
 	long long *int_value;
@@ -106,26 +73,27 @@ int main(int argc, char *argv[])
 		if ((cstatus = CDFlib(SELECT_, zVAR_, varN,
 									GET_, zVAR_DATATYPE_, &datatype, NULL_)) != CDF_OK)
 																	cdf_handle_error (cstatus);  
-		//     if (datatype == CDF_EPOCH16)  break;
 	}
+	
 	fprintf(stdout,"DATATYPE %d %d\n", varN, datatype);
 	if ((cstatus = CDFlib(SELECT_, zVAR_, varN,
 								GET_, zVAR_MAXREC_, &CDFmaxRec, NULL_)) != CDF_OK)
 										cdf_handle_error (cstatus);
 
 	fprintf(stdout,"Max Recs %d\n", CDFmaxRec+1);
-	if (CDFmaxRec < 10) {
+	
+	if (CDFmaxRec < 3) {
 		fprintf(stdout," %d\n", badFile);
 		exit (0);
 	}
 	
 	if ( datatype == CDF_TIME_TT2000 ) {
-		int_value = (long long *) malloc (sizeof(long long) * (CDFmaxRec+1));
+		int_value = (long long *) malloc (sizeof(long long) * (RecCount+1));
 		/******************* Get Epoch  *************************/
 		if ((cstatus = CDFlib (SELECT_,
 								zVAR_, varN,
 								zVAR_RECNUMBER_, RecStart,
-								zVAR_RECCOUNT_, CDFmaxRec+1,
+								zVAR_RECCOUNT_, RecCount + 1,
 								zVAR_RECINTERVAL_, RecInt,
 								zVAR_DIMINDICES_, indices,
 								zVAR_DIMCOUNTS_, counts,
@@ -134,12 +102,12 @@ int main(int argc, char *argv[])
 															cdf_handle_error (cstatus);
 	}
 	else {
-		value = (double *)malloc(sizeof(double)* (CDFmaxRec+1)*((datatype == CDF_EPOCH16)+1)); 
+		value = (double *)malloc(sizeof(double)* (RecCount + 1)*((datatype == CDF_EPOCH16)+1)); 
 		/******************* Get Epoch  *************************/
 		if ((cstatus = CDFlib (SELECT_,
 								zVAR_, varN,
 								zVAR_RECNUMBER_, RecStart,
-								zVAR_RECCOUNT_, CDFmaxRec+1,
+								zVAR_RECCOUNT_, RecCount + 1,
 								zVAR_RECINTERVAL_, RecInt,
 								zVAR_DIMINDICES_, indices,
 								zVAR_DIMCOUNTS_, counts,
@@ -147,46 +115,35 @@ int main(int argc, char *argv[])
 								GET_, zVAR_HYPERDATA_, value,  NULL_)) != CDF_OK) 
 															cdf_handle_error (cstatus);
 	}
-	
 
-  
-	delta = (int *)malloc(sizeof(int)* CDFmaxRec);
-	for (i = 1; i < CDFmaxRec+1; i++)  
-	{
+	
 		if (datatype == CDF_TIME_TT2000) {
-			dbl_value_ = CDF_TT2000_to_UTC_EPOCH(int_value[i-1]);
-			dbl_value = CDF_TT2000_to_UTC_EPOCH(int_value[i]);
-			delta[i-1] = (int)(dbl_value - dbl_value_ + 50)/100;
+			dbl_value_ = CDF_TT2000_to_UTC_EPOCH(int_value[0]);
+			dbl_value = CDF_TT2000_to_UTC_EPOCH(int_value[1]);
+			sampling = (int)(dbl_value - dbl_value_ + 50)/100;
 		}
 		else {
 			if (datatype == CDF_EPOCH16) {
-				epoch16[0] = value[2*(i-1)];
-				epoch16[1] = value[2*(i-1)+1];
+				epoch16[0] = value[0];
+				epoch16[1] = value[1];
 				EPOCH16breakdown(epoch16, &year, &month, &day, &hour, &minute, &sec, &msec, &mksec, &nsec, &psec);
-				value[i-1] = computeEPOCH(year, month, day, hour, minute, sec, msec);
-				epoch16[0] = value[2*i];
-				epoch16[1] = value[2*i+1];
+				value[0] = computeEPOCH(year, month, day, hour, minute, sec, msec);
+				epoch16[0] = value[2];
+				epoch16[1] = value[3];
 				EPOCH16breakdown(epoch16, &year, &month, &day, &hour, &minute, &sec, &msec, &mksec, &nsec, &psec);
-				value[i] = computeEPOCH(year, month, day, hour, minute, sec, msec);
+				value[1] = computeEPOCH(year, month, day, hour, minute, sec, msec);
 			}
-			delta[i-1] = (int)(value[i] - value[i-1] + 50)/100;
+			sampling = (int)(value[1] - value[0] + 50)/100;
 		}
-	}
+
 	// fprintf(stdout,"value %f\n", value[11]-value[10]);
 	if (datatype == CDF_TIME_TT2000) free(int_value); 
 	else free(value);
-	// fprintf(stdout,"delta %d\n", delta[0]);
-	numEnough = CDFmaxRec/10; 
-	while (min[1] <  numEnough) {
-		fprintf(stdout,"minFalse %d\n", minFalse);
-		find_min(delta, CDFmaxRec, minFalse, min); 
-		minFalse = min[0];
-	}
+
      
-	free(delta); 
 	if ((cstatus = CDFlib(CLOSE_, CDF_, NULL_)) != CDF_OK)
 										cdf_handle_error (cstatus);
 
 	//   fprintf(stdout,"%d %f\n",min[1], (float)min[0]/100.0);
-	fprintf(stdout,"%f\n",(float)min[0]/10.0); 
+	fprintf(stdout,"%f\n",(float)sampling/10.0); 
 }
diff --git a/php/uploadFile.php b/php/uploadFile.php
index eee7f91..eccb04b 100644
--- a/php/uploadFile.php
+++ b/php/uploadFile.php
@@ -117,11 +117,23 @@
 	$nonStd = $_POST['nonstd'] ?  $_POST['nonstd'] : null;
 	$timeLength = $_POST['timelength'] ?  $_POST['timelength'] : null;
 	$doy = isset($_POST['doy']) ?  $_POST['doy'] : null;
+	$sampling =  isset($_POST['smpl']) ?  $_POST['smpl'] : null;
+	$min_sampling = isset($_POST['min_manual_sampling']) ?  $_POST['min_manual_sampling'] : null;
+	$max_sampling = isset($_POST['max_manual_sampling']) ?  $_POST['max_manual_sampling'] : null;
+	
+	if ($sampling == "auto" && $timeSmplg == "variable" 
+				&&  (strtolower($fileFrmt) == "cdf" || strtolower($fileFrmt) == "nc")) {	
+				$response = array('success' => false, 'error' => " : Auto-definition of variable sampling for $fileFrmt isn't implemented yet. 
+				Use manual sampling definition");
+				die(json_encode($response));
+	}
+	
 	$sampData = isset($_POST['sampData']) ? $_POST['sampData'] : null;
 	$sampFileName = isset($_POST['sampFileName']) ? $_POST['sampFileName'] : null;
 
 	$allFormats = array('fileFormat' => $fileFrmt, 'timeFormat' => $timeFrmt, 'doy' => $doy,
-								'timeSampling' => $timeSmplg, 'nonStandard' => $nonStd, 'timeLength' => $timeLength);
+								'timeSampling' => $timeSmplg, 'nonStandard' => $nonStd, 'timeLength' => $timeLength,
+								'samplingType' => $sampling, 'min_sampling' => $min_sampling, 'max_sampling' => $max_sampling);
 
 	if ($_POST['filesrc'] == 'URL') $fromURL = true;  
 	else  $fromURL = false;
--
libgit2 0.21.2