<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-30 -030 13:00:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x 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" >
2026.01.30 (030) 13:00:00</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">
FF202603001301300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="9.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.499" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.864" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.100" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="115.000" Name="h`Es" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="510.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.190" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.266" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="360.562" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="248.134" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.721" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.450" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="142.349" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="42.843" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="79.721" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="190.410" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.220" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="96">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 280.000 283.000 286.000 289.000 292.000 295.000 295.000 300.000 305.000 305.000 307.500 310.000 315.000 315.000 325.000 325.000 328.333 331.667 335.000 340.000 343.333 346.667 350.000 355.000 360.000 360.000 363.333 366.667 370.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 395.000 398.333 401.667 405.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 435.000 440.000 440.000 445.000 445.000 450.000 455.000 455.000 460.000 460.000 465.000 465.000 475.000 475.000 480.000 485.000 485.000 490.000 495.000 500.000 500.000 505.000 505.000 510.000 510.000 520.000 520.000 525.000 530.000 535.000 541.358 548.689 557.232 567.318 579.404 594.151 612.547
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 0 0 51 0 57 48 0 54 54 0 51 57 45 54 57 0 0 51 54 0 0 51 54 54 54 0 0 57 57 60 57 63 60 60 63 57 63 60 57 63 0 0 48 60 63 63 63 63 60 66 60 66 57 63 66 66 66 66 60 66 60 63 60 57 63 60 60 63 60 57 63 60 57 60 60 57 51 60 54 57 57 54 51 54 54 54 51 54 54 51 51 48 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -1.953125 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.000 115.000 115.000 115.000 117.500 120.000 120.000 120.000 117.500 115.000 115.000 115.000 115.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 54 51 0 51 51 51 0 51 51 0 51 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-2.734375 0.390625 0.390625 -0.390625 -1.171875 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.514 90.0 95.0 100.0 105.0 110.0 112.387 114.774 115.0 117.161 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 360.562 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.145 2.761 3.086 3.19 3.068 3.068 3.08 3.19 3.283 3.438 3.587 3.732 3.876 4.019 4.161 4.304 4.448 4.592 4.737 4.883 5.029 5.176 5.323 5.471 5.619 5.766 5.914 6.062 6.21 6.357 6.504 6.651 6.798 6.944 7.09 7.236 7.382 7.527 7.673 7.818 7.964 8.109 8.254 8.399 8.545 8.69 8.834 8.978 9.121 9.263 9.4 9.533 9.658 9.77 9.861 9.924 9.95 9.95 9.947 9.937 9.919 9.895 9.865 9.828 9.785 9.737 9.684 9.626 9.563 9.496 9.424 9.349 9.27 9.189 9.104 9.016 8.926 8.833 8.738 8.641 8.543 8.443 8.342 8.24 8.136 8.032 7.927 7.821 7.715 7.609 7.503 7.396 7.289 7.183 7.077 6.971 6.866 6.761 6.656 6.552 6.449 6.346 6.245 6.144 6.044 5.945 5.846 5.749 5.653 5.558 5.464 5.37 5.279 5.188 5.098 5.009 4.922 4.836 4.75 4.666 4.584 4.502 4.422 4.342 4.264 4.187 4.112 4.037 3.964 3.891 3.82 3.75 3.681 3.613 3.547 3.481 3.417 3.353 3.291 3.23 3.17 3.11 3.052 2.995 2.939 2.884 2.829 2.776 2.724 2.672 2.622 2.572 2.524 2.476 2.429 2.383 2.337 2.293 2.249 2.206 2.164 2.123 2.083 2.043 2.004 1.965 1.928 1.891 1.855 1.819 1.784 1.75 1.716 1.684 1.651 1.619 1.588 1.558 1.528 1.498 1.47 1.441 1.414 1.386 1.36 1.333

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.19" PeakHeight="110.0" Num="3" Error="0.0">
-30.35 12.929 -3.065
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.19" EndFrequency="9.95" PeakHeight="360.562" Num="5" zHalfNm="248.134" Error="2.561">
-204.443 -57.999 23.445 -5.955 1.551
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.161" Depth="0.122"/>
<TopsideChapman PeakHeight="360.562" PeakDensity="1228318.9" PeakScaleHeight="79.721" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
