<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-08 -067 02:00:00.000"
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="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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: 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" >
2026.03.08 (067) 02:00:00</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">
FF202606703080200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="13.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.314" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="43.416" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="12.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="320.000" 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="4.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="293.793" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="256.999" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.427" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="53.299" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="24.482" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="27.533" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="49.090" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.670" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="188">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 235.000 235.000 235.000 235.000 235.000 235.294 235.588 235.882 236.176 236.471 236.765 237.059 237.353 237.647 237.941 238.235 238.529 238.824 239.118 239.412 239.706 240.000 240.000 240.000 240.000 240.000 240.000 240.000 245.000 245.000 245.769 246.538 247.308 248.077 248.846 249.615 250.385 251.154 251.923 252.692 253.462 254.231 255.000 255.000 255.000 255.000 255.000 260.000 265.000 255.000 255.000 255.000 255.000 260.000 260.000 255.000 256.667 258.333 260.000 260.000 260.000 265.000 265.000 266.667 268.333 270.000 265.000 265.000 265.000 260.000 262.500 265.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 270.000 270.000 265.000 265.000 270.000 270.000 270.000 275.000 280.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 277.500 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 280.000 280.000 285.000 285.000 285.000 280.000 281.250 282.500 283.750 285.000 285.000 285.000 286.176 287.353 288.529 289.706 290.882 292.059 293.235 294.412 295.588 296.765 297.941 299.118 300.294 301.471 302.647 303.824 305.000 305.000 302.500 300.000 302.500 305.000 307.500 310.000 312.500 315.000 315.000 315.000 315.000 320.000 321.667 323.333 325.000 327.500 330.000 330.000 330.000 330.000 320.000 330.000 335.000 335.000 337.500 340.000 341.475 343.215 345.299 347.838 351.001 355.051 360.419 367.878 378.940 397.051
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 66 63 63 54 60 0 60 84 78 75 0 75 0 0 0 0 0 72 66 0 0 0 75 78 0 0 0 69 72 0 78 72 72 0 72 75 78 75 72 0 69 66 72 78 0 75 0 0 72 66 57 75 72 72 0 57 78 72 75 75 75 75 75 72 78 78 81 72 69 63 0 0 63 66 57 75 75 75 78 75 75 78 75 81 78 72 75 78 78 75 78 72 75 0 69 75 78 69 75 0 78 0 75 0 78 75 78 75 72 72 78 78 78 0 75 0 72 72 72 75 69 72 69 66 0 66 57 0 0 0 63 66 63 0 0 69 57 60 0 63 63 0 66 0 51 60 57 51 48 63 57 57 54 0 0 0 0 57 63 57 57 66 60 54 54 57 0 57 54 51 57 51 54 60 51 48 51 51 0 0 0 0 45 51 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 -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 2.734375 -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 1.171875 -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 -1.171875 0.390625 0.390625 -1.171875 -0.390625 -0.390625 -1.171875 0.390625 1.171875 -0.390625 -0.390625 0.390625 1.171875 0.390625 -0.390625 0.390625 -1.171875 0.390625 1.171875 0.390625 1.171875 1.171875 -0.390625 0.390625 1.171875 0.390625 0.390625 -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 -1.171875 -0.390625 0.390625 0.390625 0.390625 -1.171875 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 1.171875 -1.171875 -0.390625 1.171875 1.953125 1.953125 -1.171875 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 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 1.171875 1.171875 1.171875 1.171875 -0.390625 0.390625 0.390625 1.171875 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="128">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.167 140.0 145.0 150.0 155.0 160.0 165.0 168.333 170.0 175.0 180.0 185.0 190.0 195.0 197.5 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 293.793 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.35 0.34 0.321 0.292 0.25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.209 0.235 0.262 0.288 0.314 0.341 0.354 0.428 0.603 0.842 1.197 1.741 2.532 3.531 4.629 5.744 6.838 7.89 8.884 9.808 10.647 11.386 12.009 12.503 12.855 13.054 13.1 13.098 13.038 12.906 12.712 12.465 12.175 11.848 11.494 11.119 10.73 10.33 9.925 9.519 9.115 8.716 8.323 7.939 7.565 7.202 6.851 6.512 6.186 5.873 5.573 5.286 5.011 4.749 4.499 4.262 4.035 3.82 3.616 3.421 3.237 3.062 2.896 2.739 2.591 2.45 2.316 2.19 2.07 1.957 1.85 1.748 1.652 1.562 1.476 1.395 1.318 1.246 1.177 1.112 1.051 0.993 0.939 0.887 0.838 0.792 0.748 0.707 0.668 0.631 0.596 0.564 0.533 0.503 0.475 0.449 0.424 0.401 0.379 0.358 0.338 0.32 0.302 0.285 0.27 0.255 0.241 0.227 0.215 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="13.1" PeakHeight="293.793" Num="5" zHalfNm="256.999" Error="1.595">
-105.532 13.559 -4.287 -0.882 0.849
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.5" Depth="0.154"/>
<TopsideChapman PeakHeight="293.793" PeakDensity="2129156.2" PeakScaleHeight="27.533" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
