<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-30 -303 23:10:00.000"
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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.10.30 (303) 23:10:00</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">
FF202630310302310009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.867" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="15.910" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="420.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="420.000" 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="5.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="446.857" 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="2.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="414.344" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="397.596" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.851" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="29.234" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="2.716" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="12.918" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="68.210" 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="72">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.0 2.05 2.1 2.15 2.2 2.25 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
445.000 435.000 432.500 430.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 420.000 425.000 430.000 430.000 425.000 423.333 421.667 420.000 422.500 425.000 427.500 430.000 432.500 435.000 440.000 445.000 450.000 455.000 458.333 461.667 465.000 468.333 471.667 475.000 478.333 481.667 485.000 475.000 495.000 502.500 510.000 515.000 520.000 510.500 501.000 491.500 482.000 472.500 463.000 453.500 444.000 434.500 425.000 425.364 425.793 426.306 426.930 427.705 428.694 430.000 431.804 434.457 438.746 446.857 467.995
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 63 60 60 63 0 60 63 57 60 60 0 0 57 0 0 63 57 0 63 66 66 0 0 57 0 69 60 63 0 60 63 0 0 54 0 0 0 0 0 0 0 0 66 60 63 0 54 0 54 0 0 0 0 0 0 0 0 0 63 0 63 57 63 63 57 0 57 0 0 54 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -1.171875 0.390625 0.390625 -1.171875 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 1.171875 1.171875 -0.390625 -0.390625 1.171875 0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -2.734375 0.390625 1.171875 0.390625 -1.953125 -2.734375 -1.171875 1.171875 -0.390625 1.171875 -1.171875 -0.390625 0.390625 -0.390625 -1.953125 -0.390625 0.390625 -1.171875 -1.171875 -0.390625 -0.390625 0.390625 -1.953125 -0.390625 1.953125 1.171875 1.953125 1.953125 1.953125 1.171875 1.171875 1.171875 1.171875 0.390625 1.953125 -0.390625 1.171875 0.390625 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="101">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.907 145.0 150.0 155.0 160.0 165.0 170.0 175.0 179.814 180.0 185.0 190.0 195.0 200.0 205.0 210.0 214.721 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 414.344 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.331 0.312 0.286 0.25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.201 0.223 0.245 0.267 0.289 0.311 0.333 0.354 0.359 0.437 0.504 0.567 0.628 0.689 0.749 0.81 0.872 0.934 0.998 1.063 1.13 1.199 1.269 1.341 1.416 1.493 1.572 1.654 1.739 1.827 1.918 2.013 2.112 2.215 2.322 2.435 2.553 2.677 2.808 2.947 3.094 3.252 3.422 3.607 3.81 4.038 4.301 4.626 5.55 5.549 5.456 5.246 4.956 4.618 4.257 3.891 3.533 3.191 2.87 2.573 2.302 2.054 1.831 1.629 1.449 1.287 1.143 1.015 0.9 0.799 0.708 0.628 0.557 0.493 0.437 0.388 0.343 0.304 0.27 0.239 0.212

</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="5.55" PeakHeight="414.344" Num="5" zHalfNm="397.596" Error="18.614">
-129.815 -106.633 40.287 -3.462 0.0
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="104.721" Depth="0.154"/>
<TopsideChapman PeakHeight="414.344" PeakDensity="382165.0" PeakScaleHeight="12.918" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
