Tweak SNR calibration.

2020-07-26 19:31:20 -05:00 · 2020-07-26 19:31:20 -05:00 · 3de14a5436
parent 4d439e5248
commit 3de14a5436
1 changed files with 6 additions and 2 deletions
--- a/lib/fst4_decode.f90
+++ b/lib/fst4_decode.f90
@ -552,9 +552,13 @@ contains
                     do i=1,NN
                        xsig=xsig+s4(itone(i),i)**2
                     enddo
-                     arg=400.0*(xsig/base)-1.0
+                     arg=600.0*(xsig/base)-1.0
                     if(arg.gt.0.0) then
-                        xsnr=10*log10(arg)-21.0-11.7*log10(nsps/800.0)
+                        xsnr=10*log10(arg)-35.5-12.5*log10(nsps/8200.0)
+                        if(ntrperiod.eq.  15) xsnr=xsnr+2
+                        if(ntrperiod.eq.  30) xsnr=xsnr+1
+                        if(ntrperiod.eq. 900) xsnr=xsnr+1
+                        if(ntrperiod.eq.1800) xsnr=xsnr+2
                     else
                        xsnr=-99.9
                     endif