sptip.c

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/* 
Copyright 2021 Arizona Board of Regents on behalf of the University of Arizona.

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of this software and associated documentation files (the "Software"), to deal
in the Software without restriction for non-commercial use educational and
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in all copies or substantial portions of the Software.

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concerning this Agreement, the parties may be required to submit the matter to
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 */


#include "extern.h"

static float sinEl[] = {2.6, 2.3, 2.0, 1.7, 1.4, 1.1, 1.4, 1.7, 2.0, 2.3, 2.6};
static float sqrarg;

int sptip_bin_data(ydata, dl, data, h)
float *ydata;
int dl;
float *data;
struct HEADER *h;
{
  int i,j;

  if(env->issmt)
  {
    for(i=0,j=0;i<dl;i+=2)
    {
      ydata[j] = (data[i] + data[i+1]) / 2.0;
      j++;
    }
  }
  else
  {
    if(h->nophase == 4)
    {
      for(i=0,j=0;i<dl;i+=4)
      {
        ydata[j] = (data[i] + data[i+1] + data[i+2] + data[i+3]) / 4.0;
        j++;
      }
    }
    else
    {
      for(i=0,j=0;i<dl;i+=2)
      {
        ydata[j] = (data[i] + data[i+1]) / 2.0;
        j++;
      }
    }
  }

  return(j);
}


int sptip_display_sptip(tau0, siga, sigb, data, h, plot, chan)
float *tau0, *siga, *sigb;
float *data;
struct HEADER *h;
int plot, chan;
{
  float  xdata[MAX_CONT_SAMPLES];
  float  ydata[MAX_CONT_SAMPLES];
  float    sig[MAX_CONT_SAMPLES];

  float a1,b1,siga1,sigb1,chi2_1,q1,
        a2,b2,siga2,sigb2,chi2_2,q2;

  int   i, j, k, dlen;
  float sinel[11], delta_airmass, upper_airmass, lower_airmass;

  dlen = (int)h->noint;

  zero_check("Sptip", dlen, data);

  dlen = sptip_bin_data(&ydata[0], dlen, data, h);

  j = 0;
  for(i=0;i<dlen;i+=2)            /* subtract vane-out from vane-in's */
  {
    ydata[j] = ydata[i] - ydata[i+1];
    j++;
  }

  dlen = j;

  if(dlen != 11)
  {
    printf("Problems: datalen != 11: %d\n", dlen);

    *tau0 = 0.0;
    *siga = 0.0;
    *sigb = 0.0;

    return(0);
  }

  for(i=0;i<dlen;i++)
  {
    xdata[i] = (float)(i) + 1.0;
    ydata[i] = log(ydata[i]);
    sig[i]   = 1.0;
  }


  if(sptip_min_max(&ydata[0], dlen, h->scan))
  {
    *tau0 = 0.0;
    *siga = 0.0;
    *sigb = 0.0;

    return(0);
  }
                  /* does the header contain the stop and start airmasses ??? */
                                                           /* if so, use them */
  if(h->sptip_start > 0.0 && h->sptip_stop > 0.0)
  {
    lower_airmass = 1.0 / sin(h->sptip_start * DEG_TO_RAD);
    upper_airmass = 1.0 / sin(h->sptip_stop  * DEG_TO_RAD);

    delta_airmass  = (upper_airmass - lower_airmass) / 5.0;

    sinel[0]  = sinel[10] = lower_airmass;
    sinel[1]  = sinel[ 9] = lower_airmass + delta_airmass * 1.0;
    sinel[2]  = sinel[ 8] = lower_airmass + delta_airmass * 2.0;
    sinel[3]  = sinel[ 7] = lower_airmass + delta_airmass * 3.0;
    sinel[4]  = sinel[ 6] = lower_airmass + delta_airmass * 4.0;
    sinel[5]  =             upper_airmass;

  }
  else                       /* if not, it's an old sptip and use the default */
  {
    for(k=0;k<11;k++)
    {
      sinel[k] = sinEl[k];
    }
  }

  sptip_lsqfit( sinel, &ydata[0], 0,  5, &sig[0], 0, &a1, &b1, &siga1, &sigb1, &chi2_1, &q1);
  sptip_lsqfit( sinel, &ydata[0], 5, 10, &sig[0], 0, &a2, &b2, &siga2, &sigb2, &chi2_2, &q2);

  a1 = (a1 + a2) /  2.0;
  b1 = (b1 + b2) / -2.0;

  *tau0 = b1;
  *siga = (siga1 + siga2) / 2.0;
  *sigb = (sigb1 + sigb2) / 2.0;

  if(!env->autotau)
  {
    st_report("%.2f: %5.4f  %f  %f", h->scan, *tau0, *siga, *sigb);
  }
  else
  {
    return(0);
  }

  if(chan == 0)
  {
    bzero((char *)&cont_sptip_send, sizeof(cont_sptip_send));
    bcopy((char *)h, (char *)&cont_sptip_send.head1, sizeof(struct HEADER));

    cont_sptip_send.issmt   = env->issmt;
    cont_sptip_send.ons     = env->ons;
    cont_sptip_send.plotwin = env->plotwin;
    cont_sptip_send.dlen    = dlen;

    for(i=0;i<dlen;i++)
    {
      cont_sptip_send.xdata[i]  = xdata[i];
      cont_sptip_send.ydata1[i] = ydata[i];
    }
  }
  else
  {
    bcopy((char *)h, (char *)&cont_sptip_send.head2, sizeof(struct HEADER));

    for(i=0;i<dlen;i++)
    {
      cont_sptip_send.ydata2[i] = ydata[i];
    }
  }

  cont_sptip_send.results[chan].tau0   = *tau0;
  cont_sptip_send.results[chan].sigmaA = *siga;
  cont_sptip_send.results[chan].sigmaB = *sigb;

  cont_sptip_send.results[chan].a = a1;
  cont_sptip_send.results[chan].b = b1;

  if(xgraphic && chan == 1)
  {
    sendCont(SEND_SPTIP);
    validate(SP_TIP);

    return(0);
  }

  validate(SP_TIP);

  return(1);
}


int cmd_doSpTip()
{
  int save;

  save = env->autotau;

  env->autotau = 0;

  doSpTip();

  env->autotau = save;

  return(0);
}


int doSpTip()
{
  int ret, i, j, n = 0;
  float tau0, siga, sigb, fscan;
  double t_total = 0.0;

  fscan = atof(args->secondArg);

  if(fscan == 0.0)
  {
    st_warn("No arg for SPTIP");
    return(1);
  }

  j = -1;

  fscan = round(fscan);

  st_report("Looking for all SPTIP scans starting with %.2f", fscan);

  for(i=0;i<4;i++)
  {
    fscan += 0.01;

    if(!env->autotau)
    {
      st_print("%s Looking for: %.4f ", prompt, fscan);
      fflush(stdout);
    }

    ret = read_scan(fscan, env->filename, h0->yplot1, &h0->head, 0);
    env->curScan = fscan;

    if(ret > 0)
    {
      st_print("Found\n");

      j++;  /* Found one */
      if(!strncmp(h0->head.obsmode, "CONTSTIP", 8))
      {
        if(j == 0)
        {
          if(!env->autotau)
          {
            st_report(" Scan     Tau0     Siga      Sigb");
          }
        }

        sptip_display_sptip(&tau0, &siga, &sigb, h0->yplot1, &h0->head, PSPLOT, j);

        t_total += tau0;
        n++;
      }
      else
      {
        st_warn("Scan %.2f is NOT an SPTIP", h0->head.scan);
        return(1);
      }
    }
  }

  if(n)
  {
    t_total /= (double)n;

    if(!env->autotau)
    {
      st_report("Average: %.4f", t_total);
    }

    env->fittedtau = t_total;

    if(!env->autotau)
    {
      if(getYesNoQuit("Use tau0 value of %.3f: y/N ?", env->fittedtau))
      {
        useTau();
      }
    }
    else
    {
      useTau();
    }
  }

  return(0);
}


int showTips()
{

  return(0);
}


int useTau()
{
  if(env->fittedtau != 0.0)
  {
    if(!env->autotau)
    {
      st_report("Using %.3f Maunal Tau", env->fittedtau);
    }
    else
    if(verboseLevel & VERBOSE_CALIBRATE)
    {
      st_report("DEBUG: Using Automatic tau0 = %.3f from scan %.0f",
                                                env->fittedtau, env->curScan);
    }

    env->mantau0 = env->fittedtau;
  }
  else
  {
    st_warn("No Current Tau to Use");
  }

  return(0);
}


int cont_display_sptip(image, plot)
struct LP_IMAGE_INFO *image;
int plot;
{
  printf("\nSPTIP Display Not Functional Yet\n\n");

  return(0);
}


#define SQR(a) (sqrarg=(a),sqrarg*sqrarg)

int sptip_lsqfit(x, y, bdata, edata, sig, mwt, a, b, siga, sigb, chi2, q)
float x[], y[], sig[], *a, *b, *siga, *sigb, *chi2, *q;
int bdata, edata, mwt;
{
  int i;
  float wt, t, sxoss, sx=0.0, sy=0.0,
        st2 = 0.0, ss, sigdat;

  *b = 0.0;

  if(mwt)
  {
    ss=0.0;

    for(i=bdata;i<edata;i++)
    {
      wt  =  1.0 / SQR(sig[i]);
      ss += wt;
      sx += x[i] * wt;
      sy += y[i] * wt;
    }
  }
  else
  {
    for(i=bdata;i<edata;i++)
    {
      sx += x[i];
      sy += y[i];
    }

    ss=edata-bdata;
  }

  sxoss=sx/ss;

  if(mwt)
  {
    for(i=bdata;i<edata;i++)
    {
      t=(x[i]-sxoss)/sig[i];
      st2 += t*t;
      *b += t*y[i]/sig[i];
    }
  }
  else
  {
    for(i=bdata;i<edata;i++)
    {
      t = x[i] - sxoss;
      st2 += t*t;
      *b  += t *y[i];
    }
  }

  *b /= st2;
  *a = (sy - sx * (*b)) / ss;

  *siga = sqrt((1.0 + sx*sx / (ss * st2)) / ss);
  *sigb = sqrt( 1.0 / st2);

  *chi2 = 0.0;

  if(mwt == 0)
  {
    for(i=bdata;i<edata;i++)
    {
      *chi2 += SQR(y[i]-(*a)-(*b)*x[i]);
    }

    *q=1.0;

    sigdat=sqrt((*chi2)/(edata-bdata-2));

    *siga *= sigdat;
    *sigb *= sigdat;
  }

  return(0);
}

#undef SQR

int sptip_min_max(ydata, dl, scan)
float *ydata;
int dl;
float scan;
{
  int i;

  if(ydata == NULL)
  {
    return(1);
  }
                                                   /* redetermine min and max */
  env->datamax = -9999999999.9;
  env->datamin = 9999999999.0;

  for(i=0;i<dl;i++)
  {
    if(ydata[i] > env->datamax)
    {
      env->datamax = ydata[i];
    }

    if(ydata[i] < env->datamin)
    {
      env->datamin = ydata[i];
    }
  }

  if(fabs(env->datamax - env->datamin) < DATASPREAD)
  {
    st_fail("Scan #%7.2f is all %.4f", scan, env->datamin);
    env->datamin -= 1.0;
    env->datamax += 1.0;

    return(1);
  }

  return(0);
}