Radiant 

Duration

Maximum (all Time + / - 12 h)

Quadrantids (Here) 

December 28-January 7 

Jan. 3 at 23 UTC

 Lyrids (Lyr) 

April 16-25

Apr. 22 at 21 UTC

Eta Aquarids

April 21-May 12

May 5 at 11 UTC 

Southern Aquarids Delta

July 14-August 18

July 28/29 

Perseids (For)

July 23-August 22

Aug. 12 at 11 UTC

Northern Iota Aquarids

August 11-September 10

Aug. 25/26

Southern Iota Aquarids

July 1-September 18

Aug. 6/7

Alpha Capricornids

July 15-September 11

Sep. 31 at 02 UTC

Orionids (Gold)

October 15-29

Oct. 21 at 14 UTC

Leonids (Leo)

November 14-20

Nov. 17 at 20 UTC (Possible Meteor Storm)

Geminids (Gem)

December 6-19

Dec. 14 at 05 UTC

The earth annually meets of sporadic meteors or in swarms. These encounter, in the greater part of the cases are regular. These meteors entering in the atmosphere enter in collision with the land atmosphere. The air molecules of the atmosphere to this impact free thermal energy and consequently (and fortunately) the meteorite burn, that is fuse and evaporate. In correspondence to the quota the E region, the atoms freed from the meteorite because of the caused thermal energy of the land atmosphere ionization strip forms one. A cylinder is delivered up, in it the volumetric density of free electrons is much advanced one to the density of the surrounding air so that the electrons begin endured to espandersi giving beginning to a process of spread for effect of which the free electron number diminishes quickly for cubic meter of trace.

A wave e.m. that it invests the trace endures a reflection that is essentially of specular type; given the quota to which the traces are formed, the maximum copribile distance goes from optimal 1500 to a maximum of 2000 km approximately.

Meteors of the diameter of 0,15mm are already in a position to giving echoes, but the traces produce an echo of short duration called in jargon PINGS  . Meteors with greater diameter (bolidi) produce traces iperdense; the echoes, that they have characteristics more than dispersion in numerous directions that of specular reflection, have the duration of several second ones, BURST , and can be taken advantage of in order to carry out of the qso. The QSO can be carried out in CW or in SSB, naturally the much easiest one to carry out qso in more profitable SSB but I use it of the CW (distances greater and possibilities to carry a.termine the qso with short BRUST), naturally in CW case will be be a matter of CW to high speed.

The relationship consta of two numbers, the first one identifies the duration of the BURST, the second the intensity of the received beacon:

2 from 2 to 5 sec.

5 inferior to S3

3 from 5 to 20 sec.

6 from S3 to S5

4 from 20 to 120 sec.

7 from S6 to S7

8 from S8 to S9

9 advanced to S9

Therefore, received a beacon for 7 second with a beacon of S7 our relationship will be: 37

According to the dispositions of the IARU reg.1, it is called for a minute in SSB and for 2.5 minuteren in CW. Moreover in the uneven minuteren it will be called from North towards South, in the equal minuteren will naturally listen to and viceversa (all that in case of qso random, in case of sked will decide the necessities second). For random the SSB it is particularly useful to follow recommendations IARU since many stations can call at the same moment, in order to avoid problems it is necessary to follow the times of call carefully and you listen therefore to avoid even than a correspondent to 100Km it is covered from the " neighbor of antenna ".

The frequencies mainly used for the RANDOM are 144.200 for SSB, 144.100 for CW.

As a QSO in SSB happens:

CQ MS DE IT9XXX BREAK
IT9XXX DE PA0YYY 27 27 BREAK
PA0YYY DE IT9XXX R26 R26 BREAK
IT9XXX DE PA0YYY ROGER ROGER

The qso it can be said confirmed. In practical the first one to give the relationship the qso will finish with the roger. Who listens to the relationship will give just preceded from one R that gives the confirmation to the correspondent to have received its. To notice also the final BREAK that ago understanding the correspondent to have stopped to communicate and not that the BURST has been interrupted.

A qso of this type it can happen second during an only BURST or repeating to along time the own communication the procedure of the alternate minuteren.