diff --git a/src/algorithms/PVT/libs/gps_l1_ca_ls_pvt.cc b/src/algorithms/PVT/libs/gps_l1_ca_ls_pvt.cc
index 4ae26a22a..488f15296 100644
--- a/src/algorithms/PVT/libs/gps_l1_ca_ls_pvt.cc
+++ b/src/algorithms/PVT/libs/gps_l1_ca_ls_pvt.cc
@@ -336,7 +336,12 @@ bool gps_l1_ca_ls_pvt::get_PVT(std::map<int,Gnss_Synchro> gnss_pseudoranges_map,
             mypos = leastSquarePos(satpos, obs, W);
             DLOG(INFO) << "(new)Position at TOW=" << GPS_current_time << " in ECEF (X,Y,Z) = " << mypos << std::endl;
             gps_l1_ca_ls_pvt::cart2geo(mypos(0), mypos(1), mypos(2), 4);
-
+            //ToDo: Find an Observables/PVT random bug with some satellite configurations that gives an erratic PVT solution (i.e. height>50 km)
+            if (d_height_m>50000)
+            {
+            	b_valid_position=false;
+            	return false; //erratic PVT
+            }
             // Compute UTC time and print PVT solution
             double secondsperweek = 604800.0; // number of seconds in one week (7*24*60*60)
             boost::posix_time::time_duration t = boost::posix_time::seconds(utc + secondsperweek*(double)GPS_week);
diff --git a/src/algorithms/channel/adapters/channel.cc b/src/algorithms/channel/adapters/channel.cc
index 5709fee50..a862aef14 100644
--- a/src/algorithms/channel/adapters/channel.cc
+++ b/src/algorithms/channel/adapters/channel.cc
@@ -84,7 +84,7 @@ Channel::Channel(ConfigurationInterface *configuration, unsigned int channel,
 
     float threshold = configuration->property("Acquisition" + boost::lexical_cast<std::string>(channel_)
     		+ ".threshold",0.0);
-    if(threshold==0.0)	threshold = configuration->property("Acquisition.threshold",0);
+    if(threshold==0.0)	threshold = configuration->property("Acquisition.threshold",0.0);
 
     acq_->set_threshold(threshold);
 
diff --git a/src/core/receiver/gnss_block_factory.cc b/src/core/receiver/gnss_block_factory.cc
index 22fff4a98..80d3ea220 100644
--- a/src/core/receiver/gnss_block_factory.cc
+++ b/src/core/receiver/gnss_block_factory.cc
@@ -55,6 +55,7 @@
 #include "freq_xlating_fir_filter.h"
 #include "gps_l1_ca_pcps_acquisition.h"
 #include "gps_l1_ca_pcps_assisted_acquisition.h"
+#include "gps_l1_ca_pcps_acquisition_fine_doppler.h"
 #include "galileo_e1_pcps_ambiguous_acquisition.h"
 #include "gps_l1_ca_dll_pll_tracking.h"
 #include "gps_l1_ca_dll_pll_optim_tracking.h"
@@ -336,6 +337,11 @@ GNSSBlockInterface* GNSSBlockFactory::GetBlock(
             block = new GalileoE1PcpsAmbiguousAcquisition(configuration, role, in_streams,
                     out_streams, queue);
         }
+    else if (implementation.compare("GPS_L1_CA_PCPS_Acquisition_Fine_Doppler") == 0)
+        {
+            block = new GpsL1CaPcpsAcquisitionFineDoppler(configuration, role, in_streams,
+                    out_streams, queue);
+        }
 
     // TRACKING BLOCKS -------------------------------------------------------------
     else if (implementation.compare("GPS_L1_CA_DLL_PLL_Tracking") == 0)