<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-28 -301 23:00:00.000"
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="14.0">
<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 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Severe F-spread, 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" >
2026.10.28 (301) 23:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202630110282300009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.833" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.978" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="385.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="385.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="453.624" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="399.898" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="367.995" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.921" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="49.875" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.163" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="23.623" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="67.680" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="89">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.714 386.429 387.143 387.857 388.571 389.286 390.000 385.000 385.000 385.000 385.833 386.667 387.500 388.333 389.167 390.000 390.000 390.000 390.000 390.000 390.000 390.000 392.000 394.000 396.000 398.000 400.000 413.333 426.667 440.000 439.231 438.462 437.692 436.923 436.154 435.385 434.615 433.846 433.077 432.308 431.538 430.769 430.000 437.500 445.000 452.500 460.000 461.250 462.500 463.750 465.000 460.000 460.000 460.000 460.000 459.615 459.231 458.846 458.462 458.077 457.692 457.308 456.923 456.538 456.154 455.769 455.385 455.000 450.000 450.000 450.000 453.624 489.495
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 57 0 0 63 0 63 57 0 63 57 60 0 66 63 63 60 0 66 66 0 60 66 69 69 0 69 0 66 0 63 60 0 0 57 0 0 63 63 0 0 60 0 0 0 60 57 0 57 0 0 0 0 0 0 57 0 60 63 0 57 57 0 60 57 57 63 60 60 60 63 0 63 0 0 0 0 63 0 57 60 0 60 60 57 54 57 60 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -0.390625 0.390625 -1.953125 0.390625 0.390625 -1.171875 -1.953125 -2.734375 -1.171875 0.390625 -1.171875 -1.953125 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -1.171875 -1.171875 0.390625 -1.953125 0.390625 0.390625 -1.953125 0.390625 0.390625 -0.390625 -0.390625 1.171875 0.390625 0.390625 -0.390625 0.390625 -1.953125 -0.390625 -1.171875 -1.171875 0.390625 -0.390625 -0.390625 0.390625 -2.734375 -0.390625 1.953125 1.953125 -1.171875 0.390625 -0.390625 -1.171875 1.171875 -1.171875 1.171875 2.734375 -1.171875 0.390625 1.171875 1.953125 2.734375 -0.390625 2.734375 1.171875 -1.171875 1.953125 1.953125 1.953125 0.390625 2.734375 2.734375 1.953125 2.734375 1.953125 -2.734375 0.390625 2.734375 1.953125 1.953125 1.171875 1.171875 1.953125 1.953125 1.953125 1.171875 1.953125 1.953125 0.390625 0.390625 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="127">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.612 145.0 150.0 155.0 160.0 165.0 170.0 175.0 179.223 180.0 185.0 190.0 195.0 200.0 205.0 210.0 213.835 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 399.898 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.344 0.331 0.311 0.284 0.247 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.203 0.226 0.248 0.27 0.292 0.315 0.337 0.354 0.38 0.472 0.554 0.634 0.716 0.801 0.888 0.979 1.073 1.172 1.274 1.382 1.493 1.61 1.731 1.857 1.989 2.126 2.268 2.417 2.572 2.734 2.902 3.078 3.262 3.455 3.657 3.869 4.093 4.329 4.58 4.847 5.132 5.439 5.772 6.13 6.494 6.7 6.7 6.671 6.591 6.469 6.312 6.127 5.921 5.699 5.466 5.227 4.985 4.744 4.505 4.27 4.041 3.819 3.605 3.4 3.203 3.015 2.836 2.666 2.505 2.353 2.209 2.073 1.945 1.824 1.71 1.603 1.502 1.408 1.319 1.236 1.158 1.084 1.015 0.951 0.891 0.834 0.781 0.731 0.684 0.641 0.6 0.562 0.526 0.492 0.461 0.431 0.404 0.378 0.354 0.331 0.31 0.29 0.272 0.254 0.238 0.223 0.208

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="6.7" PeakHeight="399.898" Num="5" zHalfNm="367.995" Error="4.399">
-145.177 -66.723 29.784 -5.157 1.21
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="103.835" Depth="0.154"/>
<TopsideChapman PeakHeight="399.898" PeakDensity="556947.9" PeakScaleHeight="23.623" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
