<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 05:00:00.000"
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="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="2 2 0 0 0 0 0 0 0 22 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Severe F-spread, 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" >
2026.10.17 (290) 05:00:00</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">
FF202629010170500009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.167" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.324" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="360.000" 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="5.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="318.984" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="284.787" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.237" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="49.701" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.720" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="25.729" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="48.860" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.100" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="36">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 315.000 315.000 315.000 315.000 316.667 318.333 320.000 320.000 321.875 323.750 325.625 327.500 329.375 331.250 333.125 335.000 336.875 338.750 340.625 342.500 344.375 346.250 348.125 350.000 355.000 355.000 357.500 360.000 360.000 360.000 365.000 375.000 385.000 390.000 425.202
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 75 63 75 69 75 63 75 75 75 72 81 69 0 75 75 0 66 69 69 66 72 72 63 72 75 72 69 63 63 69 69 63 66 69 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -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="117">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.597 150.0 155.0 160.0 165.0 170.0 175.0 180.0 183.195 185.0 190.0 195.0 200.0 205.0 210.0 215.0 219.792 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 318.984 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.333 0.316 0.292 0.261 0.217 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.208 0.229 0.25 0.271 0.292 0.313 0.334 0.354 0.359 0.486 0.644 0.838 1.074 1.355 1.685 2.064 2.488 2.953 3.45 3.967 4.491 5.007 5.498 5.947 6.337 6.654 6.884 7.017 7.05 7.049 7.014 6.935 6.819 6.67 6.497 6.302 6.093 5.872 5.644 5.412 5.178 4.945 4.714 4.488 4.267 4.052 3.844 3.643 3.45 3.265 3.087 2.918 2.757 2.603 2.457 2.319 2.187 2.063 1.945 1.833 1.728 1.628 1.534 1.445 1.361 1.282 1.207 1.137 1.07 1.008 0.949 0.893 0.841 0.792 0.745 0.701 0.66 0.621 0.585 0.551 0.518 0.488 0.459 0.432 0.407 0.383 0.36 0.339 0.319 0.3 0.282 0.266 0.25 0.235 0.222 0.209

</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="7.05" PeakHeight="318.984" Num="5" zHalfNm="284.787" Error="0.446">
-99.865 0.69 -0.095 0.011 0.067
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="109.792" Depth="0.154"/>
<TopsideChapman PeakHeight="318.984" PeakDensity="616656.3" PeakScaleHeight="25.729" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
