<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-27 -300 05:50:00.000"
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 44 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Severe F-spread, F2o cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Trace overlaps while constructing baseline</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" >
2026.10.27 (300) 05:50:00</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">
FF202630010270550009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.899" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="15.654" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="390.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="390.000" 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="0.650" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="429.546" 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="4.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="365.176" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="322.438" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.053" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="63.413" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.956" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="31.079" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="69.750" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.460" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="27">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
390.000 395.000 410.000 406.250 402.500 398.750 415.000 415.117 415.247 415.392 415.553 415.735 415.941 416.177 416.449 416.768 417.144 417.597 418.152 418.848 419.745 420.947 422.641 425.206 429.546 438.478 467.485
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 69 66 69 63 72 66 66 0 63 60 0 0 0 0 0 57 57 0 0 0 0 0 54 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 0.390625 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -0.390625 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.171875 -2.734375 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="135">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.515 150.0 155.0 160.0 165.0 170.0 175.0 180.0 181.031 185.0 190.0 195.0 200.0 205.0 210.0 215.0 216.546 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 365.176 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0
</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 0.332 0.314 0.288 0.254 0.206 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.217 0.239 0.261 0.282 0.304 0.326 0.347 0.354 0.416 0.497 0.582 0.675 0.781 0.902 1.04 1.194 1.362 1.54 1.725 1.915 2.108 2.303 2.5 2.698 2.897 3.098 3.302 3.507 3.716 3.927 4.141 4.358 4.577 4.795 5.006 5.197 5.341 5.4 5.4 5.388 5.351 5.292 5.215 5.121 5.013 4.894 4.766 4.631 4.49 4.345 4.199 4.05 3.902 3.755 3.609 3.465 3.324 3.186 3.051 2.92 2.793 2.67 2.551 2.437 2.326 2.22 2.118 2.02 1.926 1.836 1.749 1.667 1.588 1.512 1.44 1.371 1.306 1.243 1.183 1.126 1.072 1.02 0.97 0.923 0.879 0.836 0.795 0.757 0.72 0.685 0.651 0.619 0.589 0.56 0.533 0.507 0.482 0.459 0.436 0.415 0.395 0.375 0.357 0.339 0.323 0.307 0.292 0.278 0.264 0.251 0.239 0.227 0.216 0.205

</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="5.4" PeakHeight="365.176" Num="5" zHalfNm="322.438" Error="3.561">
-133.934 -26.326 16.804 -8.017 2.843
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="106.546" Depth="0.154"/>
<TopsideChapman PeakHeight="365.176" PeakDensity="361786.6" PeakScaleHeight="31.079" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
