Amateur Radio Stations heard via ISS
This page documents Amateur Radio data digipeated by the International
Space Station. In order to appear on this page, a position report in a valid
APRS format must be digipeated through ISS, then be heard by an internet gateway
station, which then forwards it on to the APRS Internet System. All APRSIS data is
archived on this machine. Packets that came through the ISS are recalled for this
display. For more info on the technology involved, see the links at the bottom
of the page.
The system will also show those stations that have been heard via ISS but have
not sent a position report in the table at the end of the page.
If you are able to transmit through the ISS digi and wish to send a packet that will make
your position appear on these maps and those of APRS users of ARISS, see:
http://www.aprs.org/iss-faq.html
The biggest weakness in the system right now is the lack of Internet Gateways, or IGates.
Almost all APRS programs have the ability to function as IGates, consult the documentation
of your program of choice for details...the more the better!
The current position of ISS, as well as the 5 and 10 minute future positions are also
shown on the map.
Regrettabbly, because of the huge cost increase recently implemented by Google for its mapping service, google maps are no longer available.
| Call | Messages | lat | lon | Age (dd:hh:mm:ss) |
 SV2CPH-4 | * | . | . | 12:09:44:03 |
 SV2CPH | * | 40.30267 | 21.79017 | 12:09:44:10 |
| RS0ISS | * | . | . | 12:09:44:25 |
 S51HF | * | 46.43167 | 15.61 | 12:09:45:05 |
| OM4ATC | * | . | . | 12:09:45:35 |
| LW2DYB-1 | * | . | . | 12:10:18:00 |
| HS6KLJ-5 | * | . | . | 12:14:28:34 |
| CE3QC-1 | * | . | . | 12:15:12:48 |
 WA7DRE-10 | * | 47.68583 | -117.458 | 12:15:35:22 |
| 7L2MDI | * | . | . | 12:15:52:09 |
| JG6YOG | * | . | . | 12:15:58:36 |
| HS6KLJ-4 | * | . | . | 12:16:01:35 |
 BH6IDD-6 | * | 34.75983 | 113.63117 | 12:16:02:46 |
 E22ZMG-9 | . | 18.77767 | 99.02567 | 12:16:04:52 |
| E27ASY-3 | * | 14.75433 | 100.733 | 12:16:05:59 |
| HS9TJB-7 | . | . | . | 12:16:06:58 |
| KC5VAZ-9 | * | . | . | 12:17:05:25 |
 KB9VIC-9 | * | 38.735 | -88.08333 | 12:17:05:46 |
 KC5ILO-10 | * | 33.588 | -95.066 | 12:17:06:19 |
| DV5CEL | * | . | . | 12:17:35:38 |
| JE2KUC | * | . | . | 12:17:35:49 |
| YC2NFD | * | . | . | 12:17:45:20 |
| K1WY | * | 41.76233 | -72.72567 | 12:18:41:29 |
| N4XHQ-6 | * | . | . | 12:18:41:39 |
| AI4LL | * | . | . | 12:18:41:53 |
| KG8CW | * | 44.62017 | -85.94167 | 12:18:42:29 |
| W4TBD-6 | * | . | . | 12:18:45:22 |
| KF0BMD-11 | * | . | . | 12:18:45:44 |
| VK3KAW-10 | * | -36.35933 | 147.12167 | 12:20:57:45 |
| VK5ATN-6 | . | . | . | 12:20:57:47 |
| WA9BNZ | * | 40.9005 | -90.26917 | 12:21:59:17 |
 VK2CJB-9 | . | -29.34317 | 151.884 | 12:22:34:03 |
| EA2AUK | * | 40.32783 | -1.09433 | 12:23:22:08 |
| KB7ADL | * | . | . | 12:23:37:58 |
 N6PAZ | * | 35.08433 | -118.6165 | 12:23:39:52 |
| K5DNA | * | . | . | 12:23:40:03 |
| KF0BMD-6 | . | . | . | 12:23:42:45 |
| K6LUM-7 | * | 45.40167 | -75.67683 | 12:23:42:53 |
| K6SQY-9 | . | . | . | 12:23:43:45 |
| OE6PWE | * | . | . | 13:00:55:15 |
| G4DCQ-2 | * | 52.9175 | 1.3315 | 13:00:55:55 |
| EA1JAO-6 | * | 43.7095 | -7.8785 | 13:00:55:56 |
| ON4BN | * | . | . | 13:00:57:20 |
| PE1NTN | * | . | . | 13:00:58:05 |
| G6UQZ-1 | * | . | . | 13:00:59:51 |
 KB2M-2 | * | 39.75117 | -75.08533 | 13:01:09:00 |
| K7KAU | * | . | . | 13:01:10:05 |
| W8DMT | * | 43.0215 | -86.10583 | 13:01:10:40 |
| WD8ED | * | . | . | 13:01:11:45 |
| K9JKM | * | . | . | 13:01:12:10 |
| K5RSB | * | . | . | 13:01:12:47 |
 KE0SWK-3 | . | 38.37583 | -93.80183 | 13:01:13:07 |
| N4UCM | * | 46.29183 | -91.75267 | 13:01:13:40 |
| KK0TT-6 | * | . | . | 13:01:13:44 |
| K5WH-3 | * | . | . | 13:01:15:19 |
| KD5DK | * | 32.61683 | -97.11117 | 13:01:16:23 |
| K5RH-3 | . | . | . | 13:01:17:20 |
 XE2EB | * | 25.62567 | -100.2845 | 13:01:17:28 |
 SQ3RAX | * | 52.30933 | 16.42933 | 13:02:27:57 |
| SV3EXT | * | 38.23633 | 21.73733 | 13:02:28:55 |
| SQ3KAR-1 | * | . | . | 13:02:32:46 |
| CT7AWH | * | . | . | 13:02:34:02 |
 K2ERK | * | 40.16717 | -74.27717 | 13:02:46:58 |
| KA3SKO-7 | * | . | . | 13:02:47:01 |
| N1RCN | * | . | . | 13:02:47:22 |
| KH2PM | * | 35.565 | -78.88367 | 13:02:47:51 |
| N4VGW-6 | * | . | . | 13:02:48:03 |
| K4KDR-6 | * | . | . | 13:02:48:31 |
| N4IFP-2 | * | 26.3255 | -80.1626 | 13:02:50:51 |
| XE3JCL-9 | * | . | . | 13:02:53:36 |
| TG5ALY-4 | * | 14.96917 | -91.42 | 13:02:53:55 |
| VK6HAM-5 | . | . | . | 13:03:38:57 |
| DF6JY | * | . | . | 13:04:05:30 |
| G7HCE | * | . | . | 13:04:08:29 |
| 9Y4DZ-11 | * | . | . | 13:04:26:45 |
| KP4CA-5 | * | 18.18983 | -67.14433 | 13:04:28:46 |
 WP4QNQ-5 | * | 18.2955 | -67.17417 | 13:04:30:15 |
| HP2BWJ-7 | * | 9.31633 | -79.87717 | 13:04:33:06 |
| R6TB | * | . | . | 13:05:40:53 |
| YO2CMI | * | . | . | 13:05:42:56 |
Click on a callsign to see a detailed map.
Recent activity
12:09:44:03 : SV2CPH-4]APOTU0,RS0ISS*,qAO,LY5OM:!4018.16N/02147.41Er 13.3V 14C TLM KN00VH
12:09:44:10 : SV2CPH]TPQX16,RS0ISS*,qAO,YT3IN-1:`1KEl y/`_"
12:09:44:15 : SV2CPH]TPQX16,RS0ISS*,qAO,YT3IN-1:`1KEl y/`efarmogigr@hotmail.com_"
12:09:44:25 : RS0ISS]0P0PT1,APRSAT,qAO,YT3IN-1:'v& l SI]ARISS-International Space Station=
12:09:45:05 : S51HF]CQ,RS0ISS*,qAR,YO6IOG-6::OM4ATC :Hello from Franci in JN76tk
12:09:45:35 : OM4ATC]4Y1Q77,RS0ISS*,DP0SNX,qAO,LY5OM:'.(Dl -/]Instagram,Twitter: @kerbal_usk 73' OM4ATC=
12:09:46:09 : S51HF]CQ,RS0ISS*,qAU,DB0LY:73s Via ISS from Slovenia de Franci in JN76tk
12:09:46:28 : S51HF]CQ,RS0ISS*,qAR,YO6IOG-6:=4625.90N/01536.60Ey 73 via ISS from Franci S51HF in JN76tk
12:09:47:25 : RS0ISS]0P0PT2,APRSAT,qAU,DB0FOR-10:'v& l SI]ARISS-International Space Station=
12:09:47:43 : S51HF]CQ,RS0ISS*,qAO,YT3IN-1:73s Via ISS from Slovenia de Franci in JN76tk
12:09:48:27 : S51HF]CQ,RS0ISS*,qAO,YT3IN-1:73s Via ISS from Slovenia de Franci in JN76tk
12:09:49:13 : SV2CPH]TPQX16,RS0ISS*,qAO,YT3IN-1:`1KEl y/`efarmogigr@hotmail.com_"
12:09:49:42 : SV2CPH]TPQX16,RS0ISS*,qAO,DL2KN-2:`1KEl y/`_"
12:09:50:01 : S51HF]CQ,RS0ISS*,qAO,YT3IN-1:73s Via ISS from Slovenia de Franci in JN76tk
12:09:50:25 : RS0ISS]0P0PT2,APRSAT,qAO,DL2KN-2:'v& l SI]ARISS-International Space Station=
12:10:18:00 : LW2DYB-1]CQ,RS0ISS*,qAR,LW2DYB-6:SatGate LW2DYB-6 - Julio - Ciudad de Miramar GF11
12:11:02:30 : RS0ISS]0P0PT3,APRSAT,qAR,JH8NJU-10:'v& l SI]ARISS-International Space Station=
12:12:38:37 : RS0ISS]0P0PT3,APRSAT,qAR,7L2IWN-13:'v& l SI]ARISS-International Space Station=
12:14:26:45 : RS0ISS]0P0PT2,APRSAT,qAR,E24CR-1:'v& l SI]ARISS-International Space Station=
12:14:28:34 : HS6KLJ-5]APRSAI,RS0ISS*,ARISS,qAR,E24CR-1:]OZ4HZ+Spender TM-481DTV
12:14:29:45 : RS0ISS]0P0PT2,APRSAT,qAR,E24CR-1:'v& l SI]ARISS-International Space Station=
12:15:08:45 : LW2DYB-1]CQ,RS0ISS*,qAR,LW2DYB-6::BLNQSL1/1:LW2DYB-6,CE3QC-6,CE3QC-1,JS1YPT,LW2EQS-8,CX4AE-1,CX8AF
12:15:08:48 : RS0ISS]0P0PT0,APRSAT,qAR,LW2DYB-6:'v& l SI]ARISS-International Space Station=
12:15:12:48 : CE3QC-1]APRS,RS0ISS*,DP0SNX,WIDE2-2,qAR,CE3QC-6:=3339.45S\07035.90WS 73 Via Satellite
12:15:35:22 : WA7DRE-10]APMI06,RS0ISS*,qAR,N7GEE-6:@121038z4741.15N/11727.48W` WA Digital Radio Enthusiasts sat-gate http://wa7dre.org/digipeater
12:15:52:09 : 7L2MDI]CQ,RS0ISS*,qAR,JH8NJU-10:=3603.45N/13942.30E-pm96 {UISS54}
12:15:54:08 : 7L2MDI]JA5BLZ,RS0ISS*,qAR,JH8NJU-10::JA5BLZ :TU 73
12:15:54:41 : 7L2MDI]JA5BLZ,RS0ISS*,qAR,JH8NJU-10::JA5BLZ :TU 73
12:15:58:36 : JG6YOG]CQ,RS0ISS*,NA1SS,qAO,BM5GSV-10::12185145wd315/ws1.15g0.00t5.69
12:15:59:52 : RS0ISS]0P0PT1,APRSAT,qAO,BM5GSV-10:'v& l SI]ARISS-International Space Station=
12:16:01:35 : HS6KLJ-4]APGJW6-1,RS0ISS*,qAO,BM5GSV-10:!1332.27N/10012.45E`000/000/A=000003
12:16:02:46 : BH6IDD-6]BEACON,RS0ISS*,APRSAT,qAO,BM5GSV-10:!3445.59N/11337.87E`73_TU_FROM_ZhengZhou_CHINA
12:16:04:52 : E22ZMG-9]AESPT4,RS0ISS*,ARISS,qAR,HS6TUX-4:!1902.41NP09858.44E]113/000/A=001066 DC:12.17V DX:66km Uptime:10:50 Topspeed:98kmh SAT:20 HDOP:0.6
12:16:05:05 : HS6KLJ-5]APRSAI,RS0ISS*,ARISS,qAR,HS6YHE-2:]OZ4HZ+Spender TM-481DTV
12:16:05:11 : HS6KLJ-5]APRSAI,RS0ISS*,ARISS,qAR,HS6TUX-4:!1332.75N/10011.30E`https://www.qrz.com/db/hs6klj
12:16:05:41 : E22ZMG-9]AESPT4,RS0ISS*,ARISS,qAR,HS6TUX-4:!1902.41NP09858.44E]113/000/A=001062 DC:12.15V DX:66km Uptime:10:49 Topspeed:98kmh SAT:20 HDOP:0.6
12:16:05:52 : RS0ISS]0P0PT1,APRSAT,qAR,HS6YHE-2:'v& l SI]ARISS-International Space Station=
12:16:05:59 : E27ASY-3]AESPG4,RS0ISS*,ARISS,qAR,HS6YHE-2::Heard :E27ASY-3 UR RPRT 599 via RS0ISS
12:16:06:09 : HS6KLJ-4]APGJW6-1,RS0ISS*,qAR,HS6TUX-4:!1332.27N/10012.45E`000/000OK03CM]AllstarLink Node 55137
12:16:06:12 : HS6KLJ-5]APRSAI,RS0ISS*,ARISS,qAR,HS6TIM:]OZ4HZ+Spender TM-481DTV
12:16:06:16 : E27ASY-3]AESPG4,RS0ISS*,ARISS,qAR,HS6TUX-4::Heard :HS6KLJ-5 UR RPRT 599 via RS0ISS
12:16:06:18 : HS6KLJ-5]APRSAI,RS0ISS*,ARISS,qAR,E27ASY-3:!1332.75N/10011.30E`https://www.qrz.com/db/hs6klj
12:16:06:47 : E22ZMG-9]AESPT4,RS0ISS*,ARISS,qAR,HS6TUX-4:!1902.41NP09858.44E]113/001/A=001072 DC:12.13V DX:66km Uptime:10:48 Topspeed:98kmh SAT:23 HDOP:0.6
12:16:06:58 : HS9TJB-7]APDR16,RS0ISS*,WIDE2-1,qAR,HS6TUX-4:=0658.0 N\09957.0 E&145.825MHz/A=000196 ถวายอาลัยพระพันปีหลวง
12:16:07:19 : HS6KLJ-5]APRSAI,RS0ISS*,ARISS,qAR,HS6TUX-4:]OZ4HZ+Spender TM-481DTV
12:16:47:50 : CE3QC-1]APRS,RS0ISS*,DP0SNX,WIDE2-2,qAR,STBARB-10:http://sat.aprs.ro
12:16:47:52 : LW2DYB-1]CQ,RS0ISS*,qAR,LW2DYB-6:=3816.15S/05752.30W`SatGate LW2DYB-6 -] "http://sat.aprs.ro"
12:16:47:55 : RS0ISS]0P0PT1,APRSAT,qAR,LW2DYB-6:'v& l SI]ARISS-International Space Station=
12:16:48:50 : CE3QC-1]APRS,RS0ISS*,DP0SNX,WIDE2-2,qAR,LW2DYB-6:=3339.45S\07035.90WS 73 Via Satellite
12:17:05:25 : KC5VAZ-9]APDR17,RS0ISS*,qAR,KA9GAP-10:=2924.03N/09841.20Wk Greetings from Alamo City EL09
12:17:05:46 : KB9VIC-9]DH4TLZ,RS0ISS*,WIDE2-1,qAR,KA9GAP-10:`t] l S\`KB9VIC EM58 OLNEY IL HOME OF WHITE SQUIRRELS _%
12:17:05:57 : RS0ISS]0P0PT1,APRSAT,qAO,KC5VAZ-9:'v& l SI]ARISS-International Space Station=
12:17:06:19 : KC5ILO-10]3S3U2W,RS0ISS*,DP0SNX,qAR,KA9GAP-10:`{[|l ]/]"5[}=
12:17:06:27 : KC5VAZ-9]APDR17,RS0ISS*,qAR,KA9GAP-10:=2924.03N/09841.20Wk Greetings from Alamo City EL09
12:17:08:50 : KC5ILO-10]3S3U2W,RS0ISS*,DP0SNX,qAR,KA9GAP-10:`{[|l ]/]"5=}=
12:17:08:57 : RS0ISS]0P0PT1,APRSAT,qAR,KA9GAP-10:'v& l SI]ARISS-International Space Station=
12:17:09:04 : KC5VAZ-9]APDR17,RS0ISS*,qAR,KA9GAP-10:=2924.03N/09841.20Wk Greetings from Alamo City EL09
12:17:09:16 : KB9VIC-9]DH4TLZ,RS0ISS*,WIDE2-1,qAR,N7GEE-6:`t] l S\`KB9VIC EM58 OLNEY IL HOME OF WHITE SQUIRRELS _%
12:17:09:49 : KC5ILO-10]3S3U2X,RS0ISS*,DP0SNX,qAR,KA9GAP-10:`{[|l ]/]"5@}=
12:17:09:51 : KB9VIC-9]DH4TLZ,RS0ISS*,WIDE2-1,qAR,N7GEE-6:`t] l S\`KB9VIC EM58 OLNEY IL HOME OF WHITE SQUIRRELS _%
12:17:10:26 : KB9VIC-9]DH4TLZ,RS0ISS*,WIDE2-1,qAR,N7GEE-6:`t] l S\`KB9VIC EM58 OLNEY IL HOME OF WHITE SQUIRRELS _%
12:17:11:01 : KB9VIC-9]DH4TLZ,RS0ISS*,WIDE2-1,qAR,KF6FES-10:`t] l S\`KB9VIC EM58 OLNEY IL HOME OF WHITE SQUIRRELS _%
12:17:11:57 : RS0ISS]0P0PT1,APRSAT,qAR,KO6KL-10:'v& l SI]ARISS-International Space Station=
12:17:35:38 : DV5CEL]CQ,RS0ISS*,qAO,BM5GSV-10:HI ALL! DE FERDIE. 73!
12:17:35:49 : JE2KUC]CQ,RS0ISS*,qAO,BM5GSV-10:PM95
12:17:37:39 : DV5CEL]CQ,RS0ISS*,qAO,BM5GSV-10::SAT :QSL and 73. ALLS WELL!
12:17:38:09 : DV5CEL]CQ,RS0ISS*,qAO,BM5GSV-10:=/I6]Gn#h!` BDV5CEL & DY5BTO STN. MARKED SAFE @ PK20jj. 73! {UISS54}
12:17:38:40 : DV5CEL]CQ,RS0ISS*,qAO,BM5GSV-10:HI ALL! DE FERDIE. 73!
12:17:41:59 : RS0ISS]0P0PT1,APRSAT,qAO,YD7VME-2:'v& l SI]ARISS-International Space Station=
12:17:45:20 : YC2NFD]APDR16,RS0ISS*,qAO,YD0ACE-6:=0734.08S/11050.02E`/A=000410 YC2NFD Sat APRS OI52kk
12:17:45:53 : YC2NFD]APDR16,RS0ISS*,qAO,YD0ACE-6:=0734.07S/11050.02E`/A=000410 YC2NFD Sat APRS OI52kk
12:17:46:21 : YC2NFD]APDR16,RS0ISS*,qAO,YB2XPF-1:=0734.07S/11050.02E`/A=000408 YC2NFD Sat APRS OI52kk
12:18:36:03 : RS0ISS]0P0PS9,APRSAT,qAO,HP2DFA-6:'v& l SI]ARISS-International Space Station=
12:18:41:29 : K1WY]TQTU7T,RS0ISS*,RS0ISS,qAO,KR4MTN-15:'dGRl -/]
12:18:41:39 : N4XHQ-6]APEG03,RS0ISS*,qAR,KA9GAP-10::AI4LL : Heard you in Hoover, Alabama via the ISS! 73!
12:18:41:41 : KC5ILO-10]3S3U2W,RS0ISS*,DP0SNX,qAO,W4TBD-10:`{[|l ]/]"5B}=
12:18:41:53 : AI4LL]APRS,RS0ISS*,qAR,KA9GAP-10:UISS CQ DE AI4LL
12:18:41:55 : N4XHQ-6]APEG03,RS0ISS*,qAR,KA9GAP-10::KB9VIC-9 : QSL and 73 via ISS!
12:18:42:01 : KB9VIC-9]DH4TLZ,RS0ISS*,WIDE2-1,qAO,KD4ADC-2:`t] l S\`KB9VIC EM58 OLNEY IL HOME OF WHITE SQUIRRELS _%
12:18:42:04 : RS0ISS]0P0PT0,APRSAT,qAO,KD4ADC-2:'v& l SI]ARISS-International Space Station=
12:18:42:29 : KG8CW]BEACON,RS0ISS*,qAR,WA8LMF-SG:=4437.21N/08556.50W-Hello from Nothern Mich EN74
12:18:42:36 : KB9VIC-9]DH4TLZ,RS0ISS*,WIDE2-1,qAO,W4TBD-10:`t] l S\`KB9VIC EM58 OLNEY IL HOME OF WHITE SQUIRRELS _%
12:18:42:52 : N4XHQ-6]APEG03,RS0ISS*,qAO,W4TBD-10:=3321.11N/08652.22W` 73 from Hoover, Alabama via the ISS! EM63ni
12:18:42:56 : N4XHQ-6]APEG03,RS0ISS*,qAO,W4TBD-10::K1WY :Heard you in Hoover, Alabama via the ISS! 73!
12:18:43:31 : K1WY]TQTU7T,RS0ISS*,RS0ISS,qAO,KD9NYE-10:'dGRl -/]
12:18:43:44 : KC5ILO-10]3S3U2W,RS0ISS*,DP0SNX,qAR,KA9GAP-10:`{[|l ]/]"5A}=
12:18:44:56 : KB9VIC-9]DH4TLZ,RS0ISS*,WIDE2-1,qAR,KD8THX-6:`t] l S\`KB9VIC EM58 OLNEY IL HOME OF WHITE SQUIRRELS _%
12:18:45:04 : RS0ISS]0P0PT0,APRSAT,qAO,W4TBD-10:'v& l SI]ARISS-International Space Station=
12:18:45:22 : W4TBD-6]CQ,RS0ISS*,qAR,W0JRT:=3726.45N/07741.04W- IGate 73 W4TBD-10
12:18:45:30 : KC5ILO-10]3S3U2W,RS0ISS*,DP0SNX,qAO,W4TBD-10:`{[|l ]/]"5I}=
12:18:45:44 : KF0BMD-11]3Y4SQZ,RS0ISS*,qAO,W4TBD-10:'pR"l S/]CMOS Sat Control Center Denver,CO QRZ.COM=
12:18:46:18 : KF0BMD-11]3Y4SQZ,RS0ISS*,qAR,WA8LMF-SG:'pR"l S/]CMOS Sat Control Center Denver,CO QRZ.COM=
12:18:48:04 : RS0ISS]0P0PT1,APRSAT,qAR,WA7DRE-10:'v& l SI]ARISS-International Space Station=
12:19:16:32 : DV5CEL]CQ,RS0ISS*,qAO,YF9UAG-1:=/I6]Gn#h!` BDV5CEL & DY5BTO STN. MARKED SAFE @ PK20jj. 73! {UISS54}
12:20:16:37 : K1WY]TQTU7T,RS0ISS*,RS0ISS,qAR,KA9GAP-10:'dGRl -/]K1WY FN31ps
12:20:17:59 : W4TBD-6]CQ,RS0ISS*,qAR,WA8LMF-4:=3726.45N/07741.04W- IGate 73 W4TBD-10
12:20:18:11 : RS0ISS]0P0PT1,APRSAT,qAR,KA9GAP-10:'v& l SI]ARISS-International Space Station=
12:20:18:39 : K1WY]TQTU7T,RS0ISS*,RS0ISS,qAO,N2HQI-10:'dGRl -/]
12:20:18:59 : W4TBD-6]CQ,RS0ISS*,qAR,KB3AWQ-10:=3726.45N/07741.04W- IGate 73 W4TBD-10
12:20:57:13 : RS0ISS]0P0PT2,APRSAT,qAR,VK3KAW-4:'v& l SI]ARISS-International Space Station=
For further info:
About APRS
Technical details of this site
About the site author, K4HG
Amateur Radio on the ISS
Email Steve at k4hg@tapr.org
This page generated at 2025-11-25 02:14:28 UTC