JE1 VACANCY RATIO = 68%

Step 1. Sampling Survey

Samples	Licence Search Results as of Aug., 2004		Callbook 1990
	# of OCCUPIED (EXISTING) —		Original : 1st Recycled	Shortfall
	Call Signs (Original + 1st Recycled)	Stations	Original : 1st Recycled	Shortfall
JE1AAA-AAZ	10 (6 + 4)	10	6 : 19	1
JE1BAA-BAZ	10 (4 + 6)	10	10 : 14	2
JE1CAA-CAZ	7 (4 + 3)	7	9 : 14	3
JE1DAA-DAZ	6 (3 + 3)	6	5 : 19	2
JE1EAA-EAZ	11 (1 + 10)	11	8 : 17	1
JE1FAA-FAZ	6 (4 + 2)	6	11 : 12	3
JE1GAA-GAZ	7 (3 + 4)	8	5 : 20	1
JE1HAA-HAZ	10 (5 + 5)	10	15 : 10	1
JE1IAA-IAZ	13 (2 + 11)	13	6 : 20	0
JE1JAA-JAZ	14 (7 + 7)	16	10 : 15	1
JE1KAA-KAZ	11 (5 + 6)	11	8 : 17	1
JE1LAA-LAZ	9 (4 + 5)	10	12 : 12	2
JE1MAA-MAZ	9 (5 + 4)	9	13 : 12	1
JE1NAA-NAZ	13 (6 + 7)	14	10 : 16	0
JE1OAA-OAZ	8 (5 + 3)	8	11 : 13	2
JE1PAA-PAZ	8 (2 + 6)	9	4 : 19	3
JE1QAA-QAZ	10 (5 + 5)	10	9 : 15	2
JE1RAA-RAZ	10 (6 + 4)	11	11 : 13	2
JE1SAA-SAZ	10 (2 + 8)	10	8 : 18	0
JE1TAA-TAZ	10 (5 + 5)	10	8 : 18	0
JE1UAA-UAZ	12 (3 + 9)	13	13 : 13	0
JE1VAA-VAZ	3 (3 + 0)	3	14 : 5	7
JE1WAA-WAZ	14 (5 + 9)	15	7 : 17	2
JE1XAA-XAZ	9 (2 + 7)	9	5 : 21	0
Total (26×24=624)	230 (97 + 133)	239	218 : 369	37

Step 2. Additional Calculation

JE1AAA and JE1XZZ are No. 80411 and No. 85718 respectively, in Licence Search's total 164068 records of Area 1 amateur stations.
This means 85718-80411+1 = 5308 stations are alive in the JE1-block.
Number of stations, however, is not equal to call sign's one.
If the licensee has two stations -- fixed and mobile, under JA's unfortunate rule -- MIC, the authority counts them as "two stations," even they two have the same call sign normally.
Assuming that the "Station : Call sign ratio" is 239:230 from the table above, "5308 stations" means "5108 call signs." (5308×230/239=5108.)
So the occupation ratio of the JE1-block is 5108/16142=31.64%; and the vacancy ratio is 68.36%.

cf. Survival Ratio of JE1s from Sampling Survay

1971-1985
- Survival Ratio of Original (1971-72) JE1 Licensees — (218+37)/624 = 40.87% (1971-1985).
  They have needed renewals twice: (1) 1976-77 and (2) 1981-82.
  This means (40.87%)^(1/2) = 63.93% / Renewal.
1985-1990
- Survival Ratio of Original (1971-72) JE1 Licensees — 218/(218+37) = 85.49% (1985-1990).
  They have needed renewals once: 1985-86.
  This means 85.49% / Renewal.
1990-2004
- Survival Ratio of Original (1971-72) JE1 Licensees — 97/218 = 44.49% (1971-2004).
  They have needed renewals 3 times: (1) 1991-92, (2) 1996-97 and (3) 2001-02.
  This means (44.49%)^(1/6) = 76.34% / Renewal.
1971-2004
- Survival Ratio of Original (1971-72) JE1 Licensees — 97/624 = 15.54% (1971-2004).
  They have needed renewals 6 times: (1) 1976-77, (2) 1981-82, (3) 1986-87, (4) 1991-92, (5) 1996-97 and (6) 2001-02.
  This means (15.54%)^(1/6) = 73.33% / Renewal.
1985-2004
- Survival Ratio of Original (1971-72) JE1 Licensees — 97/(218+37) = 38.04% (1985-2004).
  They have needed renewals 4 times: (1) 1986-87, (2) 1991-92, (3) 1996-97 and (4) 2001-02.
  This means (38.04%)^(1/4) = 78.53% / Renewal.
- Survival Ratio of 1st-Recycled (1985-86) JE1 Licensees — 133/369 = 36.04% (1985-2004).
  They have needed renewals 3 times: (1) 1990-91, (2) 1995-96 and (3) 2000-01.
- Average — (97+133)/624=36.86%

cf. Which Call Sign Will Be First Issued Three Times?

JA1WAA — JA1WAA-WAF had been used for a moment 1954-55 by later-JA0EA-EF; and already re-issued once in 1965.

The first target of the 2nd JE1 Recycle is JE1AAB.

Where,
1: Original, not recycled yet
2: Recycled once

JE1AAA 1 renewed on 2002.10.20
JE1AAB 2
JE1AAC 2
JE1AAD 2 renewed on 2000.12. 1
JE1AAE 1 renewed on 2001. 6. 7
JE1AAF 2
JE1AAG 1 renewed on 2001. 5. 7
JE1AAH 1 renewed on 1999. 9. 1  
JE1AAI 2 renewed on 2000.12. 1 
JE1AAJ 2
JE1AAK 2
JE1AAL 2 renewed on 2000.12. 1
JE1AAM 1
JE1AAN   ? (not in Callbook 1990)
JE1AAO 2 
JE1AAP 2 
JE1AAQ 2 
JE1AAR 2 
JE1AAS 2 
JE1AAT 2 
JE1AAU 2 renewed on 2000.12.28  
JE1AAV 2 
JE1AAW 2 
JE1AAX 2 
JE1AAY 1 renewed on 2001. 5. 7  
JE1AAZ 2 renewed on 2000.12. 1

cf. Real Sampled Data

Where, "2" means "Recycled," according to Callbook 1990 which clearly specifies recycled call signs. Renewed dates are appended. "DUP" is "duplicated," indicating "two stations (fixed and mobile) are licensed under one call sign."

JE1AAA   2002.10.20  
JE1AAD 2 2000.12. 1  
JE1AAE   2001. 6. 7  
JE1AAG   2001. 5. 7  
JE1AAH   1999. 9. 1
  
JE1AAI   2000.12. 1  
JE1AAL 2 2000.12. 1  
JE1AAU 2 2000.12.28  
JE1AAY   2001. 5. 7  
JE1AAZ 2 2000.12. 1  

-- A = 10 --


JE1BAA 2 2000.12. 1  
JE1BAC 2 2000.12. 1  
JE1BAE 2 2004. 5.25  
JE1BAH   2001. 6.13  
JE1BAI 2 2000.12.17  

JE1BAL   2001. 5. 7  
JE1BAN 2 2000.12.10  
JE1BAQ   2001. 7. 1  
JE1BAR   2001. 5. 7  
JE1BAT 2 2000.12. 1  

-- B = 10 --


JE1CAC   2001. 5.17  
JE1CAI 2 2001. 5.31  
JE1CAL   2001. 5.17  
JE1CAO   2000.11.10  
JE1CAQ 2 2000.12. 1  

JE1CAW 2 2000.12.17  
JE1CAY   2003. 7.20  

-- C = 7 --


JE1DAA   2001.10.17  
JE1DAC   2001. 6.24  
JE1DAD 2 2001. 5. 9  
JE1DAH   2002.10.20  
JE1DAP 2 2001. 6.22  

JE1DAY 2 2002. 9.13  

-- D = 6 --


JE1EAB 2 2000.12.10  
JE1EAD 2 2000.12.10  
JE1EAE 2 2000.12.10  
JE1EAI 2 2000.12.10  
JE1EAJ 2 2001. 7. 4  

JE1EAL 2 2001. 2. 2  
JE1EAN   1999.11. 1  
JE1EAO 2 2001. 1.16  
JE1EAT 2 2000.12.10  
JE1EAW 2 2002. 5.29  

JE1EAX 2 2002.12.4  

-- E = 11 --


JE1FAB   2001. 7.16  
JE1FAE   2003. 7.25  
JE1FAG   2000. 8.27  
JE1FAI 2 2000.12.20  
JE1FAX   2004. 7. 2  

JE1FAZ 2 2000.12.25  

-- F = 6 --


JE1GAC 2 2001. 4.12  
JE1GAG 2 2001. 1.10  
JE1GAI 2 2001. 8.15  
JE1GAP   2001. 8.17  
JE1GAP   2004. 2.20 DUP 

JE1GAQ   2000. 9.20  
JE1GAU 2 2001. 5.10  
JE1GAY   2001. 8.17  

-- G = 7 (8-1) --


JE1HAD   2003. 1.18  
JE1HAE 2 2001. 1.20  
JE1HAF 2 2001. 6.13  
JE1HAH 2 2001. 7.18  
JE1HAM   2000.12.21  

JE1HAN 2 2001. 1.20  
JE1HAO   2002.10. 2  
JE1HAP   2000. 8.27  
JE1HAR 2 2001. 1.20  
JE1HAY   2001. 9.16  

-- H = 10 --

JE1IAF 2 2001. 1.24  
JE1IAH 2 2001. 2. 1  
JE1IAI   2004. 7.20  
JE1IAK 2 2001. 1.20  
JE1IAM 2 2001. 1.20  

JE1IAN 2 2002.12.20  
JE1IAO 2 2001. 1.20  
JE1IAQ   2001.10.19  
JE1IAS 2 2001. 2.15  
JE1IAT 2 2003. 3. 5  

JE1IAV 2 2001. 7. 4  
JE1IAW 2 2001. 8. 8  
JE1IAX 2 2001. 1.20  

-- I = 13 --


JE1JAA 2 2003. 5.29  
JE1JAB 2 2001. 1.29  
JE1JAC   2002. 3. 8  
JE1JAC   2004. 3. 2 DUP 
JE1JAD   2000. 2. 1  

JE1JAH   2001.12.20  
JE1JAJ 2 2001. 1.29  
JE1JAJ | 2002. 8.24 DUP
JE1JAL 2 2001. 1.29  
JE1JAM 2 2001. 1.29  

JE1JAN   2001.12.12  
JE1JAO 2 2001. 2.15  
JE1JAR   2002. 2.17  
JE1JAS 2 2001. 2.25  
JE1JAV   2001. 3.30  

JE1JAY   2004. 3.12  

-- J = 14 (16-2) --


JE1KAA 2 2002.10.24  
JE1KAB 2 2001. 5.13  
JE1KAC 2 2001. 2.10  
JE1KAL 2 2001. 3. 7  
JE1KAO 2 2001. 2.10  

JE1KAP   2004. 2.18  
JE1KAS 2 2003.11. 5  
JE1KAV   2001.11.26  
JE1KAW   2003. 1.29  
JE1KAX   2003. 1.29  

JE1KAY   2001.10.31  

-- K = 11 --


JE1LAA   2003. 9.20  
JE1LAD   2000. 3.29  
JE1LAE 2 2000. 3. 9  
JE1LAF   2000. 9. 1  
JE1LAG 2 2001. 8. 8  

JE1LAL 2 2001. 3. 4  
JE1LAR   2001. 1.29  
JE1LAR   2001.12.16 DUP
JE1LAY 2 2001. 2.20  
JE1LAZ 2 2001.12.26  

-- L = 9 (10-1) --

JE1MAH 2 2001. 4. 5  
JE1MAJ   2001. 5.31  
JE1MAL   2001.12.16  
JE1MAM   2001.12.16  
JE1MAO 2 2001. 3. 2  

JE1MAS 2 2001. 3. 2  
JE1MAW   2000. 2.15  
JE1MAX   2002. 4. 6  
JE1MAY 2 2001. 3. 2  

-- M = 9 --


JE1NAC   2003.11.20  
JE1NAD 2 2001. 4. 5  
JE1NAE 2 2001. 4. 5  
JE1NAG   2002. 1.25  
JE1NAH 2 2001. 3. 2  

JE1NAJ   2004. 7.20  
JE1NAL   1999. 7.31  
JE1NAM 2 2001. 3. 2  
JE1NAN 2 2001. 3. 2  
JE1NAP   2002. 5.25  

JE1NAP   2002. 5.25 DUP 
JE1NAV   2001. 3.30  
JE1NAW 2 2001. 7.18  
JE1NAY 2 2001. 8.15  

-- N = 13 (14-1)--


JE1OAA   2002. 5.25  
JE1OAH 2 2001. 3.10  
JE1OAK   2000. 8.10  
JE1OAM   2002. 4.24  
JE1OAN 2 2002.12. 6  

JE1OAO   2002. 1.25  
JE1OAR 2 2003. 9. 5  
JE1OAU   2002.11.10  

-- O = 8--


JE1PAA 2 2001.10.11  
JE1PAF   2000. 5.28  
JE1PAF   2002. 8.20 DUP
JE1PAI 2 2001. 3.10  
JE1PAL 2 2001.12.12  

JE1PAQ 2 2001. 3.10  
JE1PAS 2 2002. 3. 7  
JE1PAU   2002. 5.15  
JE1PAX 2 2001. 3.10  

-- P = 8 (9-1)--

JE1QAC   2000. 8.20  
JE1QAD 2 2001. 3.20  
JE1QAF 2 2001. 4.12  
JE1QAH   2002. 5.10  
JE1QAL 2 2001. 3.20  

JE1QAN   2003. 9.20  
JE1QAO   2002. 8.14  
JE1QAP 2 2001. 3.20  
JE1QAX 2 2001. 3.20  
JE1QAZ   2000. 8.10

-- Q = 10 --

JE1RAA 2 2001. 4.10  
JE1RAB   1999.11.30  
JE1RAB   2003. 9.19 DUP 
JE1RAC   2002. 2.23  
JE1RAF   2000.10. 1  

JE1RAM   2003. 1.30  
JE1RAN 2 2001. 4.10  
JE1RAO   2002. 2.23  
JE1RAT 2 2001. 7.25  
JE1RAU 2 2001. 4.10  

JE1RAZ   2002. 4.20

-- R = 10 (11-1) --


JE1SAB 2 2003. 7.28  
JE1SAH 2 2001. 4.10  
JE1SAI   2000.11.10  
JE1SAM   2002. 9.21  
JE1SAO 2 2001. 4.10  

JE1SAS 2 2001. 4.10  
JE1SAU 2 2001. 4.10  
JE1SAV 2 2001. 4.10  
JE1SAW 2 2001. 6.28  
JE1SAZ 2 2002. 3.29 

-- S = 10 --


JE1TAB 2 2004. 7. 2  
JE1TAC 2 2001. 4.20  
JE1TAE   2002. 3.27  
JE1TAG   1999.12.20  
JE1TAH   2002. 6.20  

JE1TAM 2 2001. 4.20  
JE1TAR 2 2002.11. 8  
JE1TAS   2001.12.20  
JE1TAT   2001.12.20  
JE1TAV 2 2001. 9. 2

-- T = 10 --


JE1UAA   2001. 3.25  
JE1UAD 2 2001. 9. 5  
JE1UAE 2 2003. 8.15  
JE1UAG   2002. 6.20  
JE1UAH   2003. 8. 1  

JE1UAJ 2 2001. 7. 5  
JE1UAM 2 2001.11. 7  
JE1UAO 2 2001. 8.29  
JE1UAT 2 2001. 5.10  
JE1UAU 2 2001. 5.10  

JE1UAW 2 2001. 5.10  
JE1UAW | 2002. 2.13 DUP 
JE1UAX 2 2001. 5.10

-- U = 12 (13-1) --


JE1VAJ   2001.10. 7  
JE1VAM   2000. 7.19  
JE1VAT   2001. 3. 2  

-- V = 3 --


JE1WAC 2 2001. 6. 1  
JE1WAF 2 2000.12. 3  
JE1WAF | 2001. 6. 1 DUP 
JE1WAG 2 2002.12. 5  
JE1WAH 2 2001. 7. 5  

JE1WAK 2 2003. 5.14  
JE1WAM 2 2001. 6. 1  
JE1WAO   2002. 5.20  
JE1WAP   2003. 7.20  
JE1WAS 2 2001. 6. 1  

JE1WAT   2002. 5.20  
JE1WAV 2 2001. 6.28  
JE1WAW   2003. 5.31  
JE1WAX 2 2001. 8. 1  
JE1WAY   2003. 7. 1

-- W = 14 (15-1) --


JE1XAD 2 2002. 6.15  
JE1XAF   2001.12.10  
JE1XAK 2 2001. 6. 1  
JE1XAL   2003.10.11  
JE1XAP 2 2001. 6.10  

JE1XAT 2 2001. 6.10  
JE1XAV 2 2001. 6.10  
JE1XAX 2 2001. 6.10  
JE1XAY 2 2001. 7. 6  

-- X = 9 --

Oct. 3, 2004, Roy, JJ1WTL

JE1 VACANCY RATIO = 68%

Step 1. Sampling Survey

Step 2. Additional Calculation

cf. Survival Ratio of JE1s from Sampling Survay

1971-1985

1985-1990

1990-2004

1971-2004

1985-2004

cf. Which Call Sign Will Be First Issued Three Times?

cf. Real Sampled Data