<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-29 -029 21:20:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: F2x cusp not found, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.01.29 (029) 21:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202602901292120009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.386" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.287" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="285.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="285.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="536.767" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="1.012" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="448.984" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="319.741" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.414" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="184.503" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="56.822" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="97.932" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="171.320" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.710" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="157">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 285.000 286.667 288.333 290.000 290.000 290.000 290.000 290.000 290.000 291.667 293.333 295.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 301.500 303.000 304.500 306.000 307.500 309.000 310.500 312.000 313.500 315.000 315.833 316.667 317.500 318.333 319.167 320.000 321.000 322.000 323.000 324.000 325.000 326.250 327.500 328.750 330.000 330.000 330.000 335.000 336.667 338.333 340.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 352.500 355.000 355.000 356.250 357.500 358.750 360.000 360.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 390.000 392.500 395.000 400.000 400.000 402.500 405.000 405.000 405.000 410.000 410.000 415.000 420.000 420.000 420.000 425.000 425.000 430.000 435.000 435.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 455.000 455.000 455.000 460.000 460.000 460.000 465.000 465.000 470.000 470.000 475.000 475.000 475.000 485.000 485.000 490.000 495.000 495.000 500.000 505.000 510.000 510.000 515.000 520.000 525.000 526.250 527.500 528.750 532.570 536.767 541.401 546.542 552.279 558.723 566.012 574.324 583.891 595.020 608.128 623.794 642.849 666.524 696.731 736.609 791.684 872.691
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 0 0 57 63 66 0 63 63 0 0 66 0 0 0 0 0 0 0 0 0 60 54 0 0 0 0 0 0 0 0 0 66 0 0 0 0 0 66 0 0 66 0 60 0 66 0 63 0 0 66 0 0 66 60 0 66 0 0 66 69 0 63 66 0 0 0 66 60 63 54 63 66 57 0 66 66 63 69 63 69 60 66 69 0 69 60 66 0 66 0 63 69 66 66 60 66 69 63 66 63 51 60 66 63 66 66 63 66 63 51 60 63 54 63 66 57 60 57 63 57 63 60 57 60 60 57 57 57 57 51 57 0 51 51 0 0 0 0 60 51 0 48 54 51 48 48 48 0 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.257 95.0 100.0 105.0 110.0 115.0 120.0 125.0 126.688 130.0 135.0 140.0 143.375 145.0 150.0 155.0 160.0 160.063 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 448.984 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.674 0.877 0.98 1.012 0.995 0.942 0.848 0.805 0.805 0.805 0.805 0.805 0.825 0.887 0.949 1.011 1.012 1.086 1.17 1.263 1.365 1.477 1.599 1.731 1.873 2.025 2.187 2.36 2.542 2.735 2.937 3.15 3.371 3.602 3.841 4.088 4.343 4.603 4.868 5.137 5.409 5.682 5.954 6.224 6.491 6.754 7.012 7.264 7.508 7.744 7.972 8.191 8.401 8.602 8.793 8.974 9.146 9.307 9.459 9.601 9.733 9.856 9.969 10.072 10.166 10.251 10.326 10.392 10.449 10.497 10.535 10.565 10.586 10.597 10.6 10.6 10.596 10.587 10.573 10.554 10.531 10.503 10.471 10.435 10.394 10.35 10.303 10.251 10.197 10.14 10.079 10.016 9.95 9.882 9.811 9.739 9.664 9.587 9.509 9.428 9.347 9.264 9.179 9.094 9.007 8.919 8.831 8.742 8.652 8.561 8.471 8.379 8.287 8.195 8.103 8.011 7.918 7.826 7.734 7.641 7.549 7.457 7.366 7.275 7.184 7.093 7.003 6.913 6.824 6.735 6.647 6.56 6.473 6.386 6.301 6.216 6.131 6.048 5.965 5.883 5.801 5.721 5.641 5.562 5.484 5.406 5.33 5.254 5.179 5.104 5.031 4.958 4.887 4.816 4.746 4.676 4.608 4.54 4.474 4.408 4.343 4.278 4.215 4.152 4.09 4.029 3.969 3.909 3.851 3.793 3.736 3.679 3.624 3.569 3.515 3.461 3.409 3.357 3.306 3.255 3.206 3.157 3.108 3.061 3.014 2.967

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.012" PeakHeight="110.0" Num="3" Error="0.0">
-26.558 8.053 -1.238
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.012" EndFrequency="10.6" PeakHeight="448.984" Num="5" zHalfNm="319.741" Error="3.123">
-313.51 38.089 -16.075 3.715 -1.14
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="50.063" Depth="0.207"/>
<TopsideChapman PeakHeight="448.984" PeakDensity="1394044.6" PeakScaleHeight="97.932" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
