<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-20 -293 07:50:00.000"
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="12.0">
<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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: F2o cusp not found, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.10.20 (293) 07:50:00</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">
FF202629310200750009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.433" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.679" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" 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="4.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="295.000" 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="0.380" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="1.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="274.421" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="232.663" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.627" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="59.586" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.364" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="32.028" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="54.280" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.040" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="76">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.4 1.45 1.5 1.55 1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 215.000 216.875 218.750 220.625 222.500 224.375 226.250 228.125 230.000 230.000 230.813 231.625 232.438 233.250 234.063 234.875 235.688 236.501 237.313 238.126 238.938 239.751 240.563 241.376 242.188 243.001 243.814 244.626 245.439 246.251 247.064 247.876 248.689 249.502 250.314 251.127 251.939 252.752 253.564 254.377 255.189 256.002 256.815 257.627 258.440 259.252 260.065 260.877 261.690 262.503 263.315 264.128 264.940 265.753 266.565 267.537 268.607 269.790 271.105 272.576 274.231 276.109 278.257 280.738 283.636 287.066 291.189 295.000 305.000 310.000 320.000 335.000 360.000 400.000 480.363
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 57 0 0 0 0 0 0 0 54 63 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 51 0 0 0 0 0 0 0 0 0 0 0 0 0 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 1.953125 0.390625 -0.390625 0.390625 -0.390625 0.390625 1.171875 -0.390625 -2.734375 0.390625 -0.390625 0.390625 0.390625 0.390625 -2.734375 1.953125 -1.171875 -0.390625 -0.390625 0.390625 0.390625 -1.171875 1.953125 -0.390625 0.390625 -0.390625 0.390625 -0.390625 1.953125 0.390625 -0.390625 1.171875 0.390625 -0.390625 -1.171875 -2.734375 -1.171875 -0.390625 1.953125 0.390625 0.390625 0.390625 1.953125 -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 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 1.171875 0.390625 -0.390625 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="118">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.995 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 134.5 135.0 140.0 145.0 150.0 155.0 159.0 160.0 165.0 170.0 175.0 180.0 183.5 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 274.421 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.251 0.329 0.368 0.38 0.374 0.357 0.325 0.275 0.203 0.203 0.203 0.203 0.203 0.203 0.203 0.21 0.246 0.282 0.319 0.355 0.38 0.411 0.575 0.81 1.072 1.359 1.684 2.057 2.485 2.95 3.412 3.829 4.181 4.467 4.694 4.869 4.998 5.086 5.136 5.15 5.15 5.135 5.099 5.043 4.971 4.884 4.784 4.675 4.557 4.432 4.302 4.169 4.033 3.897 3.759 3.622 3.487 3.353 3.221 3.093 2.967 2.844 2.724 2.609 2.497 2.388 2.284 2.183 2.086 1.992 1.903 1.817 1.734 1.655 1.579 1.506 1.437 1.37 1.307 1.246 1.188 1.132 1.079 1.029 0.98 0.934 0.89 0.848 0.808 0.77 0.734 0.699 0.666 0.634 0.604 0.576 0.548 0.522 0.498 0.474 0.451 0.43 0.41 0.39 0.372 0.354 0.337 0.321 0.306 0.291 0.277 0.264 0.252 0.24 0.228 0.217 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.38" PeakHeight="110.0" Num="3" Error="0.0">
-19.645 2.825 -0.185
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.38" EndFrequency="5.15" PeakHeight="274.421" Num="5" zHalfNm="232.663" Error="3.697">
-104.01 18.984 -8.344 4.04 -1.591
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="73.5" Depth="0.177"/>
<TopsideChapman PeakHeight="274.421" PeakDensity="329063.28" PeakScaleHeight="32.028" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
