<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 09:20:00.000"
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="15.0">
<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="1 2 0 0 0 0 0 0 0 33 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: F2x cusp not found, 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" >
2026.10.17 (290) 09:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629010170920009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="7.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.436" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.912" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.600" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.060" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.500" 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="24" Val="92.625" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="94.594" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="6.543" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="327.431" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.912" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="232.670" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="179.563" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.476" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="67.724" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="10.517" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="36.166" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="86.430" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.250" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="30">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 285.000 285.000 285.000 285.000 286.667 288.333 290.000 292.500 295.000 295.000 295.000 295.000 297.500 300.000 300.000 301.667 303.333 305.000 305.000 305.000 307.151 309.551 312.247 315.296 318.773 322.775 327.431 332.914 339.467
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 78 81 81 78 0 0 69 57 60 48 66 66 0 66 72 0 0 69 78 78 75 72 72 63 0 0 0 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 2.734375 1.171875 2.734375 1.953125 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="10">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95 2.0 2.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
92.625 93.330 94.112 94.991 95.993 97.157 98.552 100.302 102.684 106.568
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 0 0 0 57 0 0 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.953125 0.390625 -0.390625 1.171875 -2.734375 -0.390625 -0.390625 -0.390625 1.953125 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="130">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
87.968 90.0 94.594 95.0 100.0 103.296 105.0 110.0 111.997 115.0 120.0 120.699 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 232.67 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 1.479 2.06 2.06 2.005 1.915 1.915 1.915 1.915 1.965 2.048 2.06 2.254 2.491 2.75 3.031 3.326 3.622 3.909 4.182 4.44 4.686 4.92 5.146 5.365 5.579 5.789 5.998 6.206 6.415 6.626 6.839 7.048 7.217 7.25 7.247 7.222 7.174 7.104 7.016 6.911 6.792 6.66 6.519 6.369 6.212 6.05 5.883 5.715 5.544 5.373 5.202 5.032 4.864 4.697 4.534 4.373 4.215 4.061 3.91 3.764 3.621 3.483 3.348 3.218 3.092 2.97 2.852 2.738 2.629 2.523 2.421 2.323 2.228 2.137 2.049 1.965 1.884 1.807 1.732 1.66 1.591 1.525 1.462 1.401 1.342 1.286 1.232 1.181 1.131 1.084 1.038 0.995 0.953 0.913 0.875 0.838 0.803 0.769 0.736 0.705 0.676 0.647 0.62 0.594 0.569 0.545 0.522 0.5 0.479 0.458 0.439 0.42 0.403 0.386 0.369 0.354 0.339 0.325 0.311 0.298 0.285 0.273 0.262 0.25 0.24 0.23 0.22 0.211 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.06" PeakHeight="94.594" Num="3" Error="0.635">
-9.539 3.677 -0.764
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.06" EndFrequency="7.25" PeakHeight="232.67" Num="5" zHalfNm="179.563" Error="2.021">
-95.842 -27.114 16.672 -7.243 1.556
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="26.105" Depth="0.145"/>
<TopsideChapman PeakHeight="232.67" PeakDensity="652140.2" PeakScaleHeight="36.166" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
