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ATRAS

Datos Generales Sitio

  • Frecuencia: 24.5 MHz
  • Ancho de Banda: 250 KHz
  • Tipo de Antenas Receptoras: lineal
  • Distancia cable (TX): ??
  • Distancia cables de antenas Rx: 80 m
  • Mediciones cada 15 min
  • Post proceso 13 28 43 58 min
  • Dirección Antena Villarino-Quinta: 15oN
  • Dirección Antena Quinta-Villarino: 195oN
  • IP antena slave Vill: 172.16.2.35
  • Filtros pasa-banda dentros del CRx: 23.5-30 MHZ
  • No. Serie DDS: 1-03
  • No. Serie CRx: 2-09
  • No. Serie PA: 1-14
  • No. serie Dtacq: D32095

09/06/2016 (Xavier, Pierre, Issac, Andy, Chuy, Johanna, Eduardo)

-Se instalaron dos varillas para tierra fisica
-Se desconecto el CRX, Se revisaron las tarjetas de los canales 7 y 1, donde se encontro que el canal I y Q estaban en buenas condiciones. Despues se reconecto el CRX.
-Se envio una señal desde el DDS de 24.5* MHZ para intentar verla en el osciloscopio.
-Se determino como conclusion que la tarjeta de comunicacion con el cable SCCI esta dañada.
-Se cambio tarjeta de comunicacion.
-Se hicieron pruebas con el analizador de espectros.
-Se reviso la integridad y longitud de los cables TX y RX.

 Antena 1Antena 2Antena 3Antena 4Antena 5Antena 6Antena 7Antena 8
Reflexion-30.4 db-29.3 db-29.3 db-28.5 db-28.5 db-30.2 db-29.3 db-18.9 db
Distancia14.12 m14.51 m14.51 m14.51 m14.51 m14.51 m14.51 m14.51 m
Reflexion-11.6 db-8.4 db-4.8 db-9.6 db-9 db-8.6 db-4.9 db-8.5 db
Distancia79.61 m79.61 m79.61 m79.61 m80 m79.61 m79.61 m79.61 m
Reflexion-34.8 db
Distancia36.86 m

- Se reviso la potencia de transimision de las antenas y el SWR.

 Antena 1Antena 2Antena 3Antena 4Antena 5Antena 6Antena 7Antena 8
Fr-24.9 MHz-24.9 MHz-activaactiva-
*--20 db--27 db-activaactiva-
SWR-1.14-1.07-activaactiva-
imgant1ant2ant3ant4ant5ant6ant7ant8
  • relative return power at resonancia.

- antenas 1, 3, 5 y 8 no tienen resonancia.

!Tareas por realizar:

- Cambiar todas las antenas a activas.
- Las antenas no esten al nivel del piso.
- Lamparas sean de luz led.
- TX de dos antenas y que no esten a nivel de piso.


08/25/2016 (Isaac)

in /home/wera/work/matlab/hfr_process/make_lst2mat_one.m add the saving of the metavariables: load /home/wera/etc/params.mat and remove the details of the save command, i.e. save it all.


08/01/2016 (Isaac)

se agregó la nueva rutina de lindsey (con el nombre de dtacq2wera_compress.m ) al directorio /home/wera/wera_import de la computadora de villarino. Esta rutina sigue generando el mismo archivo .RAW que la rutina dtacq2wera.m pero además permite generar un archivo crudo comprimido x8 veces en formato .mat

Para poder correr esta rutina se modificó también el script en shell do_process_DTA.sh que es la rutina que se encarga de las órdenes del post-procesamiento de los datos.

Se cambió el orden I-Q a "swap"

Estas modificaciones se pueden observar a partir del archivo 20162141815_vil.mat (las compresiones anteriores no son confiables)


05/21/2016 (Isaac)

- Se conecto el CPU, el dtacq, y el DDS a la UPS en la parte de la bateria
- El CRX y el multicontactos (donde viene el monitor y otras 2 cosas) tambien se conectaron a la UPS pero en la parte de la supresion de picos
- El PA lo conecte directo a la pared
Tras recuperar la comunicacion con el DDS trate de enviar una senial, para eso segui estos pasos:

- Entre a villarino como superusuario: sudo su
- me comunique con el DDS a traves de este comando: screen /dev/ttyUSB3 19200 (tambien lo intente con: screen /dev/ttyUSB2 19200)
- Para detener cualquier actividad ingrese el comando: M 0
- hice cero el bando de ancha (en vez de un barrido): Fd 0.000000000000
- seleccione una senial para mandar: F1 31.721569143658 (que corresponde a la frecuencia 27.395350e6)
- Ingrese de nuevo el comando: M 0
- y teclee el comando: M 3 (para iniciar el chirp o mejor dicho la senial)

A pesar de lo anterior el foquito del DDS nunca se prendio, trate de escuchar la senial con los audifonos conectados al DDS y tampoco nada.

Es importante mencionar que varias veces se perdio la comunicacion con el DDS, para reestablecerla tuve que reiniciar la computadora (esto se puede hacer de manera remota con el comando: reboot)

Como finalmente no logre echar a andar el DDS, apague el PA, el CRX y el dtacq (como el dtacq se seguia escuchando tambien lo desconecte). Posteriormente desconecte el DDS y me lo traje a la quinta para revision.

El DDS lo desconecte cerca de las 21:40 hrs UTC del 21-May del 2016

Fin del comunicado


05/04/2016 (Gwen, Vlado, Isaac, Andy, Dania)

Se mide con osciloscopio las fases una vez agregado el cable\\ ver archivos de osciloscopio guardados en carpeta del ftp\\

Se hacen mediciones para encontrar el nulo
Se utiliza:
-Analizador de espectros
-Antena sintonizada a la frecuencia del sitio
-VSWR
-GPS

Setup:
-El Tx se desconecta el cable principal y se conecta al VSWR utilizando cables tipo N para que este fuera del arreglo de Tx.
-Se conecta la antena al analizador de espectros
-Con GPS se marca las mediciones en distancia y angulo\\ -Se mide la lectura de potencia del analizador de espectros\\

ftp://ocomex.ens.uabc.mx/Dania/01FOTOSSITIOS/20160503


04/22/2016 (Ryan, Ian, Vlado, Andy, Dania)
-Se cambia PA 1-04 por que existe un problema con la tarjeta en el que va el rabbit, hay que reparar se pone el PA 1-14\\ -Al PA 1-14 se le pone el LPF FL273 MLP que estaba en el PA 1-04
-El PA 1-04 se queda con el filtro FL3MLP-HFDR SN 002
-Se arregla antena 1 de las Rx
ftp://ocomex.ens.uabc.mx/Dania/01FOTOSSITIOS/20160422


04/20/2016 (Isaac, Ian, Ryan, GWen, Jose, Sthepi, JOhanna, Dania)
Calibración de Tx
Durante la prueba:
-CRX-8 y Dtacq se encuentra apagados
-El DDS se pone en modo de calibración agregando una carga BNC de 50 Ohm en el panel posterior

Equipo necesario:
-barrilitos
-Osciloscopio
-T BNC
-Cargas 50 ohms
-conectores tipo N hembra a BNC macho
-cables con conectores tipo N macho de la misma longitud

 ---------
| |Tx IN ---- CONECTA al dds \\

| PA |Tx OUT ---- CONECTADA ANTENA 1 (PUEDE SER CUALQUIERA)
---------

areglo Tx
MAR
1 2
4 3
Primera medicion
-Antena 2, conectada al canal 2 color verde
-Antena 3, conectada al canal 1 color amarillo
Deberian estar en fase, tienen una diferencia de 29.87 ns, medida con osciloscopio, necesitan aproximadamente 3m para estar en fase
Diferencia en amplitud de 44.62 mV

-A la antena 2, canal 2 color verde se le conecta un cable de 3 m, se ponen en fase


Se cambia de osciloscopio para tener una lectura de las 4 antenas
-Antena 1, canal 2 color Azul
-Antena 2, canal 3 color Morada
-Antena 3, canal 4 color verde
-Antena 4, canal 1 color amarilla


04/07/2016 (Andy, Vlado, César, Isaac, Chuy, Pierre, Ian, Ryan, Wen, Dania)

- Se trabaja en mover la orientación de la ubiquiti despues de prueba se regresa a como estaba originalmente

Pa se aumentó 3dB de atenuación

se arregló el cable de la antena 3 del Tx

3 4

2 1

Mar

- el cable original mide 9.27 m + 0.97 m No se sabe por qué tiene esta medida????

ftp://ocomex.ens.uabc.mx/Dania/01FOTOSSITIOS/20160407/WP_20160407_005.jpg
ftp://ocomex.ens.uabc.mx/Dania/01FOTOSSITIOS/20160407/WP_20160407_004.jpg

- se cambia por dos cables, 5 m + 5.24 m unidos por un barrilito por no tener un cable de la medida del que se reemplaza Se usaron 5 conectores 506 uno se echó a perder por qué se intentó la técnica de soldar pin central, no fue posible por el cautin no calienta la suficiente la soldadura

ftp://ocomex.ens.uabc.mx/Dania/01FOTOSSITIOS/20160407/WP_20160407_007.jpg
ftp://ocomex.ens.uabc.mx/Dania/01FOTOSSITIOS/20160407/WP_20160407_012.jpg
ftp://ocomex.ens.uabc.mx/Dania/01FOTOSSITIOS/20160407/WP_20160407_018.jpg
ftp://ocomex.ens.uabc.mx/Dania/01FOTOSSITIOS/20160407/WP_20160407_019.jpg

- Con Ian se mide la potencia en cada una de las TX, se observan mediciones muy diferentes entre cada una, en teoría deberían tener valores similares.

ftp://ocomex.ens.uabc.mx/Dania/01FOTOSSITIOS/20160407/WP_20160407_042.jpg
ftp://ocomex.ens.uabc.mx/Dania/01FOTOSSITIOS/20160407/WP_20160407_043.jpg
ftp://ocomex.ens.uabc.mx/Dania/01FOTOSSITIOS/20160407/WP_20160407_044.jpg
ftp://ocomex.ens.uabc.mx/Dania/01FOTOSSITIOS/20160407/WP_20160407_045.jpg

Lo anterior nos comenta Pierre es debido a:

- La antena 3 donde se encuentra instalada está un cable de corriente lo cual actúa como un corto circuito para la Tx - El Arreglo no debería estar detrás de la palmera, se debería mover frente a la Palmera

'comentarios Pierre de Rx'

- Antenas ponerlas más arriba - algunas están instaladas dónde está un cable de electricidad lo cual es ocasiona corto circuito - sugiere poner lámparas de paneles solares para eliminar ese cable de corriente y arriba poner las RX

ftp://ocomex.ens.uabc.mx/Dania/01FOTOSSITIOS/20160407/WP_20160407_047.jpg


11/03/16 (Andy, Dania)

Se visita el sitio por que la conexión de internet se encuentra intermitente se sospechaba que la antena ubiquiti no estuviera direccionada con la Qta.

  • La antena ubiquiti esta OK.
  • Se resetea, se desconecta de la corriente, se vuelve a conectar.
  • Regresa el internet por unos minutos pero se va
  • Se resetea de nuevo, igual se tiene internet por unos minutos y se va
  • Se mueve físicamente la antena, siguen los resultados igual, se regresa como estaba 15o N
  • Debido a los fuertes vientes de días anteriores la antena 8 esta caída, ver fotos
  • Se encuentran construyendo a un lado del radar, ver fotos.

ftp://ocomex.ens.uabc.mx/Dania/01FOTOSSITIOS/20160311


24/11/15 (Andy, Dania)

Se apaga CRX-8 de las 18:12 UTC a 18:30 UTC

En el CRX-8 se intercambiaron los canales I & Q 1,3,5,7 y 2, 4 en las tarjetas LNA para dejar todas las salidas del canal I conectadas en la parte de arriba (Top Side "I") y las Q quedan conectadas todas a la parte de abajo (Bottom side "Q")

NOTA: Se detecta que en los ultimos 3 dias (21, 22, 23, dia de hoy) hay mucho ruido y el alcance disminuye aproximadamente 10 km en el horario aproximado de las 18 UTC (10 AM) a las 23 UTC (3 PM )


11/13/15 (Andy, Dania)

Se revisa conexion del CRX-8 para compararlo con los CRX-8 del sauzal y del laboratorio

no hay mediciones de las 22:40 a las 23:40 UTC


11/3/15 (Pierre)

  • vil has not acquired data since day 303, disk full condition
  • erased raw data for day 302-303 to make space
  • disable raw data archiving in do_process_DTA.sh
  • restarted all processing

10/16/15 (Andy, Vlado, Dania)

Mediciones 20152892230 a 20152892358

  • Se revisa el techo, de estación
  • Se revisa el PA
  ->Se apago, se encendió, sigue sin Acceso
  ->Se cambia cable, sigue sin acceso
  ->se apaga, se cambia tarjeta de red, sigue igual.
     ^se prueba el PA del Sauzal trabaja bien 
     ^Se prueba el PA de Villarino haciendo un ping el PA no funciona, se hace un ping con el DITAQ si reacciona  
     ^Se concluye que no es la tarjeta de red ni el cable por lo que no se puede comunicar con el PA 
  • Cambio de tarjetas en el CRX-8 para hacerlas antenas activas en antenas 6 y 7
     ^se comprueba que la lectura de voltaje directamente en antenas sea alrededor de 10.5 V en las antenas 6 y 7 que se cambiaron a activas. 

ftp://ocomex.ens.uabc.mx/Dania/20151016/IMG_0764.JPG
ftp://ocomex.ens.uabc.mx/Dania/20151016/IMG_0768.JPG


10/14/15 (Pierre)

  • changed NaNed ranges to 37-44 in mergebeam.m4, to avoid 120 Hz intermodulation at range 40 which is 24 km, outside Bahia de Todos Santos and only in a side lobe of radar

22/09/15 (Pierre)

  • disk was full, acquisitions stopped until 20152651200
  • moved /home/wera/data/vil/TEST to /mnt as root and gzipped all CAL files
  • recovered 14 Gb of disk space, acquisition restarted
  • CAUTION! room for only 2 days of operation

27/08/15 (Vladimir)

Hoy en la mañana cuando estuvimos en Villarino, borre los datos almacenados en las carpetas debido a que el espacio en el computador de VIL era insuficientes

/home/wera/data/acq164_095/

desde 2015135 a 2015165.

La primera carpeta borrada (2015135) era efectivamente la primera que se generó luego que Pierre cambió el computador en dicha estación. Ya revise en el servidor OCOMEX y encontré en la siguiente carpeta

/media/mraid/Datos/WERA/vil

desde 2015135 a 2015165

casi los mismos archivos borrados en el computador de VIL. El unico archivo que no aparece en cada carpeta es el archivo .mat.

El espacio en este computador quedo de la siguiente manera

Filesystem || Size || Used || Avail || Use% || Mounted on

  • /dev/sda1 || 16G || 6.8G || 8.1G || 46% || /
  • none || 4.0K || 0 || 4.0K || 0% || /sys/fs/cgroup
  • udev || 3.9G || 4.0K || 3.9G || 1% || /dev
  • tmpfs || 788M || 884K || 788M || 1% || /run
  • none || 5.0M || 0 || 5.0M || 0% || /run/lock
  • none || 3.9G || 128K || 3.9G || 1% || /run/shm
  • none || 100M || 52K || 100M || 1% || /run/user
  • /dev/sda3 || 886G || 623G || 219G || 75% || /home

17/07/15 (Vladimir)

I have not been able to access the AP VIL from here. I followed the steps you mentioned (telnet PA 5200 ...). Last week I was in VIL and perform a verification of the Ethernet cables. The ethernet cables are good.

  • BTW, it is telnet 5220. Is the ethernet card of the PC working? connect a laptop in place of the PA using same cable. The port has dhcp. Does the laptop get an internet address and can it reach the outside world? Erase the content of /var/lib/dhcp/. Is a new address served? erase again and reconnect/reboot the PA (wait 30 sec as there is a small internal UPS). Is an address leased?

Then this is a good idea to do it in future calibrations, match each time changing the frequency demodulation.

  • Unless the demodulation frequency is within 200 Hz of the transmitter frequency, you will see nothing.

though you should use the program plotxlsq to compute the antenna phases. Thank You. I'll take this suggestion into account for future calibrations.

  • You can reanalyze all your previous calibrations using plotxlsq.

According to the suggestions you made, I use the piece of code to plot the data. I use the values generated by QTA with a frequency of 24.5 MHz. I use 4 files (20151890015, 0030, 0045, 0100). The attached figure 20151890015 shows the data in each of the 8 antennas (NANT) with IQ = 1 (the figures of the other times are equal). The results suggest that the antennas are not receiving a signal as in the case of KAL. This suggests, according with your comment, that the noise could be very high relative to the received signal. On the other hand, I do not understand why the signal received at each antenna is different.

  • There is absolutely no data in your latest plots. What you are seeing is the small uncorrected offset of the A/D channels, which are typically 5-6 bits. The A/D does 23 bits in 10 V, which is 1 microvolt precision. Uncorrected offset are typically 100 microvolts. They are of course different for all channels. Do a mean(mean(wera(1,:,:,:),2),3)) that should give you the mean of each channel. Then compute the variance of each channel. You will find that for your data the variance is the same size as the mean, which shows there is no data, not even external noise. In the plots you made, something is not connected. Possibly the SCSI connector fell of or is ajar?
  • Tracking down the source of this noise is critical.

According to what you mentioned, these three tasks should be done in all radar stations (QTA, CON, VIL, SAU) or only in VIL? Definitely all, none of your sites have the expected range of > 40 km at that frequency. Look at http://cordc.ucsd.edu/projects/mapping/stats/?sta=KAK&aff=UH

  • poorly installed connectors on the RX and LO lines. Do you suggests change all connectors on the RX?

No, but you need to figure out where the noise comes from. For example, you could use a calibration cable to feed a small signal to each antenna base in succession, and make a 80-Hz off spectrum. Is that spectrum clean (i.e. -130 dB) or is it also dirty?

  • Could you explain me, what is the LO lines?

Local oscillator. They are marked LO on the back of the DDS and CRX.

  • very noisy power with floating grounds. What is the floating grounds? How could you fix this? any ideas?

I should that to all of you in Sauzal. Radars need to be connected through isolation transformers. The secondary neutral must be locally grounded. You do not do that in any of your sites. You risk damaging equipment and feeding noisy power to your system.

  • power lines running close to the antenna cable (try to think of what the light lines in VIL running along the antennas do!). On the next visit to VIL I will verify this.

Look at is on the back of the wooden posts on which the RX antennas are attached!

  • Could you please send the link to access at the wiki Hawaii (where Marie wrote the experiments that we did here).

I meant, log on your ocomex wiki at http://ocomex.ens.uabc.mx/wiki/index.php?n=Main.Radares. Marie probably used her personal wiki in Hawaii because she was not shown how to use the ocomex wiki.

  • To access the wiki Hawaii, I need some loggin and pass?

There are many wikis in Hawaii. Our generic documentation wiki is http://www.satlab.hawaii.edu/wiki/index.php no password. The UABC wiki for documentation regarding what I delivered you is http://www.satlab.hawaii.edu/support/uabc/wiki/ username uabc password sverdrup. Our internal (messy but rich) wiki is at http://www.satlab.hawaii.edu/radlab/wiki/


16/07/15 (Vladimir)

In recent days I've been doing various experiments in order to perform the calibration of the VIL station. For this calibration, I use the two stations (not simultaneously) QTA and CON. First on the VIL station, manually shut down the PA (I could not turn it off remotely

  • to shut off PA: telnet pa 5220 then issue command "h" for halt; command "?". presently there is something wrong with the PA connection, can't talk to it from the server. Are the ethernet cables good?

Then from a computer in LA QUINTA, I followed the recommendations made by Pierre: on VIL, become root, screen /dev/ttyUSB3 19200 to talk to primary DDS, then Fd 0.000000000000 (12 digits) then M 0 then M 3.

  • correct. I checked when you were doing it and VIL was correctly programmed

in QTA (CON) use weradesk to stop continuous acquisition and set "test calibration" on QTA, set transmit frequency (see list below). Was verify with the little radio that signal is emitted. let it run for ~2 hours. I use multiple frequencies to generate the signal from the weradesk of QTA (CON), waiting to listen VIL. Use a frequency range equal to twice the bandwidth of VIL (+/- 250 kHz) around VIL (24.5 MHz), changing every 125 kHz frequency, thus: 24.75, 24,625, 24.5, 24.375 and 24.25. I did this because I wanted to explore frequencies around the middle of the chirp until the base of the chirp.

  • Unless you change the frequency of VIL each time, that will not work. The reason is that the signal is demodulated by VIL in the receivers with a low-pass at 2 kHz. Any frequency difference larger than that, you will not see. Doing calibrations at the base, middle and top of the chirp is very usefil, but requires that you match each time the demodulation frequency,

I made a first analysis of the results, using the code that I did with Marie (from the .mat file to create the .CAL file). I use the plotlsq program to plot the files.

  • though you should use the program plotxlsq to compute the antenna phases

I use only the files generated 15 minutes after starting the calibration and 15 minutes before ending the calibration (to avoid scanning files immediately generated calibration starts-end). I did graphics (from 6 different frequencies, see above) every 15 minutes during ~ 2 hours (~ 7 files or more) looking for some signal generated by QTA (CON) on VIL. I found a signal generated from QTA with a frequency of 24.75 MHz, at one of the .CAL files (see QTA-VIL.pdf). The signal was found in 20151881830_vil.CAL and appears at ~ +/- 80Hz. This signal was not found in other files generated during the two hours of this calibration. I look in the files generated from CON with 24.75 MHz, but not found any signal. These results suggest that in VIL with the signal generated from QTA are not representative.

  • Don't forget that crystal clocks do not have exact frequency and are usually 10-100 Hz off. So what you think is 80 Hz off, may be anything. You have to test, or use a precise time base to measure the frequencies of the bistatic sites.

Right now I'm working with the .mat file generated by LERA in order to perform other graphics, as suggested by Pierre.

  • code for that is: imagesc(squeeze(squeeze(wera(1,:,1,:)))). note that the matrix wera is (1:IQ,1:MT,1:NANT,1:NCHIRP) where MT is the number of samples/chirp (an important WERA definition which is in the WERA header). Look carefully at the plot. attached is the ones from sau (bad intermodulation) and the one from kal (good Bragg signal). What does the one from VIL in bistatic mode look?

In case you have any idea about it, I ask you please to let me know it.

  • I looked at your spectra. THEY ARE VERY NOISY, but show clearly that you were running both QTA and CON, with about 85 HZ and 50 Hz difference, which is typical of clock precisions. However the noisy is so big, that I think sometimes the lines that you are looking for are below the noise level. Typically, when you do bistatic, you should have abour 110-130 dB signal/to/noise. You only have 70 dB here. That may explain the very poor range that all your radars have - at 27 MHz, I get 45 km range both for KAK and for PPK, and you barely get 15 km range. Tracking down the source of this noise is critical. Could be: 1. poorly installed connectors on the RX and LO lines. 2. very noisy power with floating grounds. 3. power lines running close to the antenna cable (try to think of what the light lines in VIL running along the antennas do!)

15/07/15 (Vladimir)

In recent days I've been doing various experiments in order to perform the calibration of the VIL station. For this calibration, I use the two stations (not simultaneously) QTA and CON. First on the VIL station, manually shut down the PA (I could not turn it off remotely). Then from a computer in LA QUINTA, I followed the recommendations made by Pierre: - on VIL, become root, screen /dev/ttyUSB3 19200 to talk to primary DDS, then Fd 0.000000000000 (12 digits) then M 0 then M 3. - in QTA (CON) use weradesk to stop continuous acquisition and set "test calibration" on QTA, set transmit frequency (see list below). Was verify with the little radio that signal is emitted. - let it run for ~2 hours.

I use multiple frequencies to generate the signal from the weradesk of QTA (CON), waiting to listen VIL. Use a frequency range equal to twice the bandwidth of VIL (+/- 250 kHz) around VIL (24.5 MHz), changing every 125 kHz frequency, thus: 24.75, 24,625, 24.5, 24.375 and 24.25. I did this because I wanted to explore frequencies around the middle of the chirp until the base of the chirp.

I made a first analysis of the results, using the code that I did with Marie (from the .mat file to create the .CAL file). I use the plotlsq program to plot the files. I use only the files generated 15 minutes after starting the calibration and 15 minutes before ending the calibration (to avoid scanning files immediately generated calibration starts-end). I did graphics (from 6 different frequencies, see above) every 15 minutes during ~ 2 hours (~ 7 files or more) looking for some signal generated by QTA (CON) on VIL.

I found a signal generated from QTA with a frequency of 24.75 MHz, at one of the .CAL files (see QTA-VIL.pdf). The signal was found in 20151881830_vil.CAL and appears at ~ +/- 80Hz. This signal was not found in other files generated during the two hours of this calibration. I look in the files generated from CON with 24.75 MHz, but not found any signal. These results suggest that in VIL with the signal generated from QTA are not representative.


01/07/15 (Vladimir & Marie)

  • Bi Static Calibration: VIL (RX) LISTEN TO CON(TX)
  • From 01/07/15 10h Local Time to01/07/15 10h15 Local time: ERROR, we have to SWITCH OFF THE PA.

*FIRST FILE WRONG: 20151821700_vil.mat ; LAST FILE WRONG: 20151821715_vil.mat ARE WRONG

  • Back to normal acquisition for VIL and CON at 10h15 Local time (17h15UTC). WAITING FOR INSTRUCTIONS
  • SWITCH OF PA on vil sites (Physically)
  • Re run the Bistatic Calibration at 17h30 (Local time) the 01/07/2015. VIL(RX) LISTEN to CON(TX)

FIRST FILE: 1830030_vil.mat ; LAST FILE: 1830245_vil.mat

  • Re run Bistatic calibration at 20h (Local time) the 01/07/2015; VIL(RX) LISTEN to QTA(Tx)
  • First file: 1830300_vil.mat ; LAST file:1831500_vil.mat

30/06/15 (Vladimir & Marie)

  • Bistatic Calibration: VIL (RX) LISTEN to QTA(TX) from 14h15 Local time to 16h30 Local time.
  • Working frequency on WERA DESK for CONALEP = 24.375 MHz (Working freq of VIL, and no the center frequency at 24.5 MHz)
  • CAL file available on :/home/wera/data/vil

FIRST FILE:20151812115_vil.mar LAST FILE: 20151812330_vil.mat ---> NO GOOD we have to SWITCH OFF THE PA.


7/6/15 (Pierre)

  • made a mergebeam mask range cell 38-41 to NaN the 60 Hz
  • implemented automatic mkdaydir with crontabbed mvdaydir

31/5/15 (Pierre)

  • cleaned up all configuration files, processing scripts, with later revisions.
  • software configuration of site is complete and backed up on ocomex in ocomex-vil

29/5/15 (Pierre)

  • implemented etc/params.mat listing the Scripps parameters
  • changed chirp rate to 0.325 from 0.2166

26/5/15 (Vladimir)

  • Se reduce la atenuación del PA 1 dBm para incrementar la potencia a 43 dBm (20 W)
 http://ocomex.ens.uabc.mx/wiki/uploads/foto4
  • Working frequency 24.5 MHz
  • Low frequency 24.373 MHz (measured with the little radio)
  • High frequency 24.625 MHz (measured with the little radio)
  • Bandwidht 0.252 MHz
  • The working frequency is the middle frequency of the chirp.

21/5/15 (Pierre)

  • changed crontab.wera and crontab.root and crontab@dtacq to 4 aquisitions/hour
  • implemented hourly mergebeam postprocessing

19/5/15 (Pierre)

  • updated params.cfg to common version
  • corrected sites_ang for the correct angles

15/5/15 (Xavier, Juan, Andreas)

  • reparado la fuga de aqua en el techo
  • instalado segunda tarjeta Ethernet en el PC
  • configurar PA con IP 172.16.4.21
  • el amplificador transmite 42 dBm
  • debemos aumentar la potencia de 46 dBm y attenuar los receptores si es necesario

14/5/15 (Xavier, Dania)

  • El PA transmite 40 dBm, DDS 17 dBm
  • En la IN del PA se pone un atenuador de 10 dB se leen con el power sensor 12.96 dBm, en total se tiene 43 dBm = 20 W.
  • El atenuador de pasos externo del PA se pone en 2 dB se lee 17.76 dBm.
  • La señal del PA reflejada aproximadamente (7.5 a 8.5) dBm + los 40 dBm del DDS = 32 dBm (2 W)
  • PA señal transmitida 3 dBm mas los 40 dBm = 43 dBm
  • Entrada -3.3 dB
  • Salida 42.3 dBm
  • Se deja 16 dB de atenuación fisica en la entrada

13/5/15. (Xavier, Pierre)

  • poner todos los aparatos electrónicos en la UPS
  • instalado el nuevo PC
  • eliminado router y PC conectado directamente a la ubiquity con IP 172.16.2.43
  • configurar dtacq con IP 172.16.3.12
  • configuración del amplificador para transmitir 43 dBM
  • todos los componentes operacionales
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Page last modified on April 19, 2017, at 03:45 AM PST