KEK GPS System Monitor

summary trigger rate LTC osc. drift satellite tracking 1PPS + TRG histograms process histograms

TRG vs. GPS1/GPS2 statistics GPS2 tracking plots saved plot examples

last update: Thu May 26 09:00:37 JST 2005 (local time) /  Thu May 26 00:00:37 UTC 2005 (UTC)


most recent log summary of gpstrg

****************** summary gpstrg version 030920 **************************
| start time (UTC):     Sun Sep 26 08:19:35 2004
| end time   (UTC):     Fri May 13 17:34:01 2005
| runtime [D:HH:MM:SS]: 229:09:14:10
| sleep   [D:HH:MM:SS]: 223:06:46:20  = 97.34 %
| successful events:     1728209 = 0.087 Hz
| VMETRG events:         1728243 = 0.087 Hz
| V533   events:         1734636 = 0.088 Hz
| TT-ET  events:         1728210 = 0.087 Hz
| TCP transmissions:     1548400   [failed: 179809]
| TCP current status:   CONNECTED
| IRIG-B errors:              10
+---------------------------------------GPS1:TrueTime-----GPS2:Motorola---+
| GPS:  LTC 1PPS pulses/skipped:       19798303 /  4893  19798304 /  4904 |
|       LTC good(<100ns)/bad(>500ns):  19798216 /    30  19785038 /   182 |
|       ok <200ns:  1721612 /vs.TTET:   1728052           1721663         |
|       200ns-1us:     1873 /vs.TTET:         3              1745         |
|       bad >1us:      4724 /vs.TTET:       154              4801         |
|       LTC lower bits stuck (fixed):         6                 0         |
|       1PPS GPS skips/fixed:              5051 /  1596     78201 / 37807 |
|       GPS vs. CPU time async./>60s:    739129 /     2    775731 /     2 |
|       last 5-min LTC freq. avg.:      50000000.000 Hz   50000000.013 Hz |
|       GPS time received / errors:    19798300 /  3329  19798307 /     0 |
|       Sat info received / other:            - /     -   4052869 /    13 |
|       Serial data skipped / missed:         0 /  2264     35468 / 40293 |
|       Trigger delay compensation:     113040 nsec                       |
+-------------------------------------------------------------------------+
| LTC:  first read  [0,1,2,both]:  960742661       36        5  19798264  |
|       second read [0,1,2,both]:          0        0        1        40  |
+-------------------------------------------------------------------------+
| Fifo: total events processed:               1734651                     |
|       [0] both EF flags=0:                        0                     |
|       [1] only EFDATA=0 (=> dummy read):    1728267                     |
|       [2] only EFEVCNT=0:                         0                     |
|       [3] both EF flags=1:                     6384                     |
|       internal event number skips:                1                     |
|       bad transitions:    67956  (ok:     46225 /  fixed:     21731)    |
+-------------------------------------------------------------------------+
| LTC6:  980540974 status checks             =   49.5 per second          |
|               39 status register errors                                 |
|       3245731719 bytes Motorola data read  =  163.8 per second          |
|              442 serial data buffer full                                |
|         19812113 @@Ea +  19812272 @@En +  4053461 @@Bb +    11 other @@ |
|       1093178031 fifo clock cycles         =   55.2 per second          |
|        112637065 fifo read cycles          =    5.7 per second          |
|                2 times fifo full                                        |
|                8 fifo out of synch                                      |
|       input#:__________TRG0_______TRG1_______TRG2_______TRG3_______TRG4 |
|       triggers:     1734522   19818359   19818358   19818359    1739396 |
|       inc good:     1734520   19818358   19818356   19818359    1739395 |
|       inc error:          2          1          2          0          1 |
|       inc fixed:          1          0          1          0          0 |
|       inc ok:             0          0          0          0          0 |
|       inc bad:            1          1          1          0          1 |
|       noise:              0          0          1          0          0 |
|       1PPS:_______________TRG1:TrueTime___TRG2:Motorola___TRG3:Rubidium |
|       pulses/skipped:    19818358 / 339  19818357 /   8  19818358 /   8 |
|       good<100/bad>500:  19817990 / 339  19813217 /  21  19818349 /   8 |
|       TRG good <200ns:    1724893 -TTET   1721467 -TTET   1723223 -TTET |
|       TRG 200ns-1us:            0 -TTET      1756 -TTET         0 -TTET |
|       TRG bad >1us:          3316 -TTET      4986 -TTET      4986 -TTET |
|       avg. frequency (Hz): 50000000.000    50000000.013    50000000.000 |
|       pre-spill delay:    1093183 nsec +/-    57 / 979603 (errors:    2) |
+-------------------------------------------------------------------------+
| last Motorola GPS status (05-13-2005 17:33:22):
| N 36d09'08.312" E 140d04'19.186" 80.4m SAT=8/10 stat=0x08
| current sat info: ID Dopp. EL  AZ SNR Stat Mode
|                   03  -403 73 345  32 0xa2 0x08 => AVAIL FOR POSITION
|                   11  3731  9 205  -- ---- ---- 
|                   13 -1887 14 267  24 0xa2 0x08 => AVAIL FOR POSITION
|                   15 -1056 42  64  30 0xa2 0x08 => AVAIL FOR POSITION
|                   16 -1459 49  86  31 0xa2 0x08 => AVAIL FOR POSITION
|                   19  1058 61 268  27 0xa2 0x08 => AVAIL FOR POSITION
|                   21 -2896 10  38  18 0xa2 0x08 => AVAIL FOR POSITION
|                   22  2036  5 101  -- ---- ---- 
|                   23 -2648 10 236  24 0xa2 0x08 => AVAIL FOR POSITION
|                   27  2919 22 315  21 0xa2 0x08 => AVAIL FOR POSITION
+-------------------------------------------------------------------------+
| TrueTime XL-DC init responses:
| Start Time:     F03  UTC  09/26/04 08:19:23
| Avg. Position:  F56 N 36d09'8.2" E 140d04'19.4"    79m ENTERED
| Operation Mode: F53 TIME: 5 SATS
| Fault Status:   F72 Antenna: OK  PLL: OK  GPS: Locked
| Software Ver.:  TRUETIME Mk III sys ver 020 GPS-XL V1.036   182-6017v011
***************************************************************************


Spill Trigger rate of last 7 days


spill rate(s) measured at GPS VME modules [time/date in UTC]

LTC oscillator drift of last 7 days (large table)

LTC drift
LTC oscillator drift from 50.0 MHz [time/date in UTC]

GPS satellite tracking plot of last 7 days


GPS satellite visibility and tracking from Motorola data [time/date in UTC]


GPS 1PPS and gpstrg output histograms of today (050513)

Note, y-axis is log scale! To avoid gnuplot errors, I defined log(y=0)=-1.


TrueTime 1PPS vs. LTC oscillator distribution

TrueTime TRG-1PPS vs. TrueTime EventTime dist.

Motorola 1PPS vs. LTC oscillator distribution

Motorola TRG-1PPS vs. TrueTime EventTime dist.

TrueTime 1PPS vs. Motorola 1PPS distribution

TrueTime TRG-1PPS vs. Motorola TRG-1PPS dist.


GPS 1PPS and gpstrg output histograms of previous day (050512)


TrueTime 1PPS vs. LTC oscillator distribution

TrueTime TRG-1PPS vs. TrueTime EventTime dist.

Motorola 1PPS vs. LTC oscillator distribution

Motorola TRG-1PPS vs. TrueTime EventTime dist.

TrueTime 1PPS vs. Motorola 1PPS distribution

TrueTime TRG-1PPS vs. Motorola TRG-1PPS dist.


CPU time vs. TrueTime drift (today=050513)



CPU time vs. TrueTime drift (yesterday=050512)




TRG data processing times (today=050513)



TRG data processing times (yesterday=050512)




Various Debugging Histograms (tables)   [today=050513   /   yesterday=050512]

GPS 1PPS + TRG distribution: (format) today / yesterday / last 30 days
CPU time vs. GPS 1PPS time: (format) today / yesterday / last 30 days
Motorola GPS status, etc.: (format) today / yesterday / last 30 days
Tracked GPS Satellite Positions: (format) today / yesterday last 30 days
Visible GPS Satellite Positions: (format) today / yesterday last 30 days
gpstrg processing delays: (format) today / yesterday / last 30 days
RS232 port statistics: (format) today / yesterday / last 30 days


Links related to the KEK GPS system


last automatic update: Thu May 26 09:00:37 JST 2005 (errorlog)