<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-08 -067 02:20:00.000"
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="18.0">
<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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp</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" >
2026.03.08 (067) 02:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606703080220009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="14.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.324" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="47.036" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="14.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="13.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="326.655" 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="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="287.447" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="249.723" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.202" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="54.793" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="29.254" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="28.159" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="50.670" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.640" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="229">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75 12.8 12.85 12.9 12.95 13.0 13.05 13.1 13.15 13.2 13.25 13.3 13.35 13.4 13.45 13.5 13.55 13.6 13.65 13.7 13.75 13.8 13.85 13.9 13.95 14.0 14.05 14.1 14.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 230.000 230.000 230.000 230.000 230.000 230.000 225.000 227.500 230.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 226.250 227.500 228.750 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 235.000 235.000 233.333 231.667 230.000 230.000 240.000 235.000 230.000 230.000 235.000 235.000 240.000 237.500 235.000 235.000 237.500 240.000 238.333 236.667 235.000 235.000 235.000 240.000 240.000 240.000 240.000 240.000 245.000 242.500 240.000 240.000 240.000 240.000 242.500 245.000 245.000 250.000 250.000 245.000 240.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 250.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 250.000 252.500 255.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 255.000 250.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 260.000 265.000 265.000 263.333 261.667 260.000 260.000 260.000 262.500 265.000 265.000 265.000 265.000 262.500 260.000 260.000 260.000 260.000 260.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 270.000 270.000 272.500 275.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 281.667 283.333 285.000 280.000 280.000 282.500 285.000 285.000 285.000 282.500 280.000 280.000 280.000 280.000 280.000 281.667 283.333 285.000 285.000 280.000 280.000 295.000 290.000 290.000 290.000 290.000 295.000 295.000 295.000 290.000 290.000 295.000 295.000 295.000 295.000 295.000 296.667 298.333 300.000 302.500 305.000 305.000 305.000 305.000 307.500 310.000 310.000 310.000 310.000 315.000 320.000 320.000 320.000 320.000 325.000 325.000 326.655 328.482 330.509 332.771 335.311 338.185 341.462 345.235 349.623 354.791 360.968 368.482 377.817 389.729
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 60 0 0 0 0 63 69 0 66 78 0 0 0 72 72 78 0 0 0 0 0 0 57 60 0 0 0 72 0 72 0 0 60 66 0 0 0 0 0 72 66 57 69 72 54 0 69 69 0 63 0 0 63 69 69 75 72 72 0 66 0 0 72 60 75 81 0 72 66 57 60 0 72 72 75 75 78 78 78 78 72 69 69 75 69 0 0 0 0 75 0 0 66 75 0 66 57 0 57 48 48 0 60 78 78 75 72 78 81 78 69 78 69 72 0 0 75 60 0 0 0 78 75 72 69 69 63 0 66 69 75 66 69 75 78 81 75 78 72 63 54 66 51 66 66 60 63 0 57 57 60 63 63 54 54 57 0 57 0 0 45 57 60 0 51 0 57 48 63 66 63 60 60 0 0 69 66 60 54 57 57 60 66 66 60 57 57 63 63 66 69 69 63 66 0 57 66 0 57 60 63 60 57 57 66 60 63 66 63 0 66 66 57 75 66 60 60 0 0 0 0 54 0 48 57 60 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -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 -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 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 -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 1.171875 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 1.171875 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 0.390625 0.390625 1.171875 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 1.953125 1.171875 0.390625 1.171875 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -1.953125 1.953125 1.953125 0.390625 1.953125 1.171875 0.390625 1.953125 1.171875 1.171875 1.953125 1.171875 1.953125 1.953125 1.171875 1.953125 1.171875 1.953125 1.171875 1.953125 1.953125 1.953125 1.953125 1.953125 0.390625 1.953125 1.171875 1.171875 1.953125 1.953125 1.171875 0.390625 0.390625 1.171875 0.390625 2.734375 -0.390625 1.171875 1.171875 0.390625 1.171875 1.953125 1.171875 1.953125 1.171875 1.171875 1.953125 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.953125 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.171875 1.171875 1.171875 1.171875 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="130">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 136.833 140.0 145.0 150.0 155.0 160.0 163.667 165.0 170.0 175.0 180.0 185.0 190.0 190.5 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 287.447 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.35 0.337 0.314 0.279 0.226 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.208 0.236 0.265 0.294 0.322 0.351 0.354 0.492 0.696 1.009 1.533 2.385 3.492 4.669 5.831 6.958 8.042 9.078 10.058 10.97 11.801 12.533 13.149 13.631 13.962 14.13 14.15 14.139 14.056 13.901 13.684 13.415 13.101 12.752 12.375 11.978 11.565 11.142 10.715 10.286 9.859 9.437 9.022 8.615 8.219 7.834 7.461 7.101 6.754 6.421 6.1 5.793 5.5 5.219 4.951 4.695 4.452 4.22 3.999 3.789 3.59 3.4 3.221 3.05 2.888 2.734 2.589 2.45 2.32 2.195 2.078 1.967 1.861 1.761 1.667 1.577 1.492 1.412 1.336 1.264 1.196 1.132 1.071 1.013 0.959 0.907 0.858 0.812 0.768 0.727 0.687 0.65 0.615 0.582 0.551 0.521 0.493 0.466 0.441 0.417 0.395 0.373 0.353 0.334 0.316 0.299 0.283 0.268 0.253 0.24 0.227 0.214 0.203

</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="14.15" PeakHeight="287.447" Num="5" zHalfNm="249.723" Error="1.565">
-107.987 15.375 -3.357 -2.106 1.128
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="80.5" Depth="0.154"/>
<TopsideChapman PeakHeight="287.447" PeakDensity="2484150.0" PeakScaleHeight="28.159" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
