EA6VQ's 144 MHz EME calendar 2018

You could also be interested in the on-line EME calculator and the DX news and calendar database

   EA6VQ's EME WEEKEND CALENDAR - 2018    EA6VQ's EME BEST DAYS - 2018 (DGRD < 2.0 dB)
  

Weekend
2018

CONDITIONS on 144 MHz

Jan    06-07

Very good -> Good

13-14

Very poor

20-21

Moderate

27-28

Moderate

Feb     03-04

Very good -> Moderate

10-11

Very poor

17-18

Moderate

24-25

Poor -> Moderate

Mar    03-04

Good -> Moderate

10-11

Very poor

17-18

Moderate

24-25

Poor -> Moderate

31-01

Moderate

Apr     07-08

Very poor

14-15

Moderate

21-22

Moderate -> Good

28-29

Moderate
May    05-06 Very poor

12-13

Moderate

19-20

Good -> Excellent

26-27

Moderate -> Poor

Jun    02-03

Very poor -> Poor

09-10

Moderate

16-17

Excellent

23-24

Poor

30-01

Poor
Jul    07-08 Moderate
14-15 Excellent
21-22 Poor -> Very poor
28-29 Poor -> Moderate

Aug    04-05

Moderate

11-12

Excellent but New Moon on 11th

18-19

Poor -> Very poor

25-26

Poor -> Moderate
Sep    01-02 Moderate
08-09 Excellent but New Moon on 9th
15-16 Very poor
22-23 Moderate
29-30 Moderate

Oct    06-07

Excellent -> Very good

13-14

Very poor

20-21

Moderate

27-28

Moderate -> Poor
Nov    03-04 Very good -> Good
10-11 Very poor
17-18 Moderate
24-25 Moderate -> Poor

Dec   01-02

Good -> Moderate

08-09

Very poor

15-16

Moderate

22-23

Poor -> Moderate

29-30

Moderate
        

Days

CONDITIONS on 144 MHz
Jan 2-6 Best DGRD = 0.2 dB on 4th
Jan 30-Feb 3 Best DGRD = 0.2 dB on 31st
Feb 26-Mar 3 Best DGRD = 0.4 dB on 28th
Mar 26-30 Best DGRD = 0.7 dB on 27th
Apr 22-26 Best DGRD = 0.7 dB on 23rd
May 19-23 Best DGRD = 0.6 dB on 20th
Jun 16-19 Best DGRD = 0.4 dB on 17th
Jul 13-17 Best DGRD = 0.1 dB on 14th (Best conditions of 2018)
BUT New Moon on 13th
Aug 10-13 Best DGRD = 0.1 dB on 11th (Best conditions of 2018)
BUT New Moon on 11th
Sep 6-10 Best DGRD = 0.3 dB on 7th BUT New Moon on 9th
Oct 4-7 Best DGRD = 0.6 dB on 5th
Oct 31-Nov 3 Best DGRD = 0.7 dB on 1st
Nov 27-Dec 1 Best DGRD = 0.6 dB on 28th
Dec 24-28 Best DGRD = 0.4 dB on 25th

The best EME conditions occur when:

  1. The Earth-Moon distance is at the absolute minimum and
  2. The Moon is in the coldest sky region (less background noise) along the moon path.

The effect of distance is independent of frequency, but sky temperature decreases with frequency, up to ~1 GHz and then levels out. The EME signal-to-noise ratio, in dB, is DGRDaded, from the minimum, by a factor (DGRD, see below), which varies over hourly, daily, weekly, monthly and yearly time periods. As a guide for the basic weekend EME conditions the present calendar lists the expected conditions based on the DGRDadation (DGRD) value. Factors such as local noise, antenna beam width, side lobes, polarization, etc. can also affect the s/n ratio of moon bounce signals.

Conditions:

Summary of EME conditions as controlled by DGRD at 144 MHz and New Moon. Conditions may be worse, due to ionospheric disturbance, local noise and polarity, but not better than indicated.

In general, 144 MHz DGRD:

Within a day of New Moon (NM), high sun noise can make conditions very bad regardless of the DGRD.
 

 
Share: Twitter   Facebook   Buzz  
Home page Site map Radio Sherlock search engine Terms of service  Privacy  Cookies 



Select Language English EspaƱol

0 user comments


Add your public comment to this page. (Important: Only respectful comments directly related to the content of this page will be accepted here. Inquires and complains must be sent to the webmaster.)

Name / Callsign
E-mail (Will not appear online)
Comment
To prevent automated Bots form spamming, please enter the text you see in the image below in the appropriate input box. Your comment will only be submitted if the strings match. Please ensure that your browser supports and accepts cookies, or your comment cannot be verified correctly.
»