diff --git a/demod/mod/m10mod.c b/demod/mod/m10mod.c
index d328be0..90a53a6 100644
--- a/demod/mod/m10mod.c
+++ b/demod/mod/m10mod.c
@@ -89,6 +89,7 @@ typedef struct {
 
 
 /* -------------------------------------------------------------------------- */
+#define SECONDS_IN_WEEK  (604800.0)  // 7*86400
 /*
  * Convert GPS Week and Seconds to Modified Julian Day.
  * - Adapted from sci.astro FAQ.
@@ -769,6 +770,7 @@ static int print_pos(gpx_t *gpx, int csOK) {
                 int j;
                 char sn_id[4+12] = "M10-";
                 ui8_t aprs_id[4];
+                double sec_gps0 = (double)gpx->week*SECONDS_IN_WEEK + gpx->tow_ms/1e3;
                 // UTC = GPS - UTC_OFS  (ab 1.1.2017: UTC_OFS=18sec)
                 int utc_s = gpx->gpssec - gpx->utc_ofs;
                 int utc_week = gpx->week;
@@ -788,7 +790,9 @@ static int print_pos(gpx_t *gpx, int csOK) {
                 sn_id[15] = '\0';
                 for (j = 0; sn_id[j]; j++) { if (sn_id[j] == ' ') sn_id[j] = '-'; }
 
-                fprintf(stdout, "{ \"id\": \"%s\", \"datetime\": \"%04d-%02d-%02dT%02d:%02d:%06.3fZ\", \"lat\": %.5f, \"lon\": %.5f, \"alt\": %.5f, \"vel_h\": %.5f, \"heading\": %.5f, \"vel_v\": %.5f, \"sats\": %d",
+                fprintf(stdout, "{ ");
+                fprintf(stdout, "\"frame\": %lu ,", (unsigned long)(sec_gps0+0.5));
+                fprintf(stdout, "\"id\": \"%s\", \"datetime\": \"%04d-%02d-%02dT%02d:%02d:%06.3fZ\", \"lat\": %.5f, \"lon\": %.5f, \"alt\": %.5f, \"vel_h\": %.5f, \"heading\": %.5f, \"vel_v\": %.5f, \"sats\": %d",
                                sn_id, utc_jahr, utc_monat, utc_tag, utc_std, utc_min, utc_sek, gpx->lat, gpx->lon, gpx->alt, gpx->vH, gpx->vD, gpx->vV, gpx->numSV);
                 // APRS id, 9 characters
                 aprs_id[0] = gpx->frame_bytes[pos_SN+2];
diff --git a/demod/multi/m10base.c b/demod/multi/m10base.c
index f17035d..04d361d 100644
--- a/demod/multi/m10base.c
+++ b/demod/multi/m10base.c
@@ -88,6 +88,7 @@ typedef struct {
 
 
 /* -------------------------------------------------------------------------- */
+#define SECONDS_IN_WEEK  (604800.0)  // 7*86400
 /*
  * Convert GPS Week and Seconds to Modified Julian Day.
  * - Adapted from sci.astro FAQ.
@@ -767,6 +768,8 @@ static int print_pos(gpx_t *gpx, int csOK) {
             if (csOK) {
                 int j;
                 char sn_id[4+12] = "M10-";
+                ui8_t aprs_id[4];
+                double sec_gps0 = (double)gpx->week*SECONDS_IN_WEEK + gpx->tow_ms/1e3;
                 // UTC = GPS - UTC_OFS  (ab 1.1.2017: UTC_OFS=18sec)
                 int utc_s = gpx->gpssec - gpx->utc_ofs;
                 int utc_week = gpx->week;
@@ -786,8 +789,17 @@ static int print_pos(gpx_t *gpx, int csOK) {
                 sn_id[15] = '\0';
                 for (j = 0; sn_id[j]; j++) { if (sn_id[j] == ' ') sn_id[j] = '-'; }
 
-                fprintf(stdout, "{ \"id\": \"%s\", \"datetime\": \"%04d-%02d-%02dT%02d:%02d:%06.3fZ\", \"lat\": %.5f, \"lon\": %.5f, \"alt\": %.5f, \"vel_h\": %.5f, \"heading\": %.5f, \"vel_v\": %.5f, \"sats\": %d",
+                fprintf(stdout, "{ ");
+                fprintf(stdout, "\"frame\": %lu ,", (unsigned long)(sec_gps0+0.5));
+                fprintf(stdout, "\"id\": \"%s\", \"datetime\": \"%04d-%02d-%02dT%02d:%02d:%06.3fZ\", \"lat\": %.5f, \"lon\": %.5f, \"alt\": %.5f, \"vel_h\": %.5f, \"heading\": %.5f, \"vel_v\": %.5f, \"sats\": %d",
                                sn_id, utc_jahr, utc_monat, utc_tag, utc_std, utc_min, utc_sek, gpx->lat, gpx->lon, gpx->alt, gpx->vH, gpx->vD, gpx->vV, gpx->numSV);
+                // APRS id, 9 characters
+                aprs_id[0] = gpx->frame_bytes[pos_SN+2];
+                aprs_id[1] = gpx->frame_bytes[pos_SN] & 0xF;
+                aprs_id[2] = gpx->frame_bytes[pos_SN+4];
+                aprs_id[3] = gpx->frame_bytes[pos_SN+3];
+                fprintf(stdout, ", \"aprsid\": \"ME%02X%1X%02X%02X\"", aprs_id[0], aprs_id[1], aprs_id[2], aprs_id[3]);
+                // temperature
                 if (gpx->option.ptu) {
                     float t = get_Temp(gpx, 0);
                     if (t > -273.0) fprintf(stdout, ", \"temp\": %.1f", t);