<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-08 -067 21:40:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x 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" >
2026.03.08 (067) 21:40:00</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">
FF202606703082140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.456" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.206" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="325.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="325.000" 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="0.500" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="545.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.559" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="429.041" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="355.081" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.056" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="108.609" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="26.109" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="54.671" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="113.160" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.700" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="136">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
325.000 325.000 327.500 330.000 332.500 335.000 335.000 335.000 337.500 340.000 335.000 335.000 335.000 335.000 340.000 341.111 342.222 343.333 344.444 345.556 346.667 347.778 348.889 350.000 350.000 351.250 352.500 353.750 355.000 356.250 357.500 358.750 360.000 361.667 363.333 365.000 365.000 365.000 360.000 362.500 365.000 367.500 370.000 372.500 375.000 377.500 380.000 375.000 375.000 375.000 380.000 381.667 383.333 385.000 385.000 385.000 390.000 391.250 392.500 393.750 395.000 395.000 400.000 400.000 400.000 400.000 400.000 405.000 405.000 406.429 407.857 409.286 410.714 412.143 413.571 415.000 415.000 418.750 422.500 426.250 430.000 430.000 430.000 430.000 430.000 432.500 435.000 440.000 440.000 440.000 445.000 450.000 450.000 452.500 455.000 455.000 460.000 460.000 465.000 465.000 465.000 475.000 475.000 475.000 475.000 480.000 480.000 480.000 485.000 490.000 495.000 495.000 500.000 500.000 505.000 510.000 510.000 510.000 515.000 520.000 520.000 525.000 530.000 530.000 535.000 540.000 540.000 545.000 545.000 555.000 560.000 565.000 573.206 582.972 594.787 609.373
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 60 0 0 0 69 0 72 0 0 69 0 0 63 72 0 0 0 0 0 0 0 0 66 66 0 0 57 0 0 0 0 63 51 0 54 0 57 54 0 0 0 0 0 0 0 54 66 0 0 63 0 0 54 51 60 51 0 0 0 54 63 51 0 0 69 69 66 66 0 0 48 0 0 0 60 60 0 54 0 51 54 0 63 60 0 63 60 66 66 69 60 63 0 63 66 60 69 60 60 63 48 54 60 66 60 60 57 63 63 54 63 57 63 0 51 0 60 60 57 57 60 60 66 63 60 66 66 69 66 63 54 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 -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 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.953125 -1.171875 1.171875 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 2.734375 0.390625 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.171875 -1.171875 -1.953125 -1.171875 0.390625 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 0.390625 0.390625 -0.390625 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.29 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 137.119 140.0 145.0 150.0 155.0 160.0 164.238 165.0 170.0 175.0 180.0 185.0 190.0 191.357 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 429.041 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.37 0.484 0.541 0.559 0.551 0.528 0.486 0.421 0.316 0.249 0.249 0.249 0.249 0.249 0.249 0.249 0.258 0.315 0.372 0.429 0.486 0.543 0.559 0.64 0.73 0.815 0.902 0.992 1.088 1.19 1.3 1.42 1.55 1.69 1.843 2.007 2.183 2.37 2.568 2.775 2.991 3.213 3.442 3.677 3.915 4.157 4.402 4.649 4.899 5.15 5.403 5.657 5.911 6.167 6.422 6.678 6.933 7.186 7.438 7.686 7.93 8.167 8.396 8.613 8.815 8.998 9.157 9.286 9.381 9.436 9.45 9.45 9.439 9.414 9.376 9.325 9.263 9.19 9.107 9.015 8.914 8.807 8.692 8.572 8.447 8.317 8.183 8.045 7.905 7.763 7.618 7.473 7.326 7.179 7.031 6.884 6.737 6.59 6.444 6.3 6.156 6.014 5.874 5.735 5.598 5.463 5.33 5.199 5.07 4.944 4.82 4.698 4.578 4.461 4.346 4.233 4.123 4.016 3.91 3.807 3.706 3.608 3.512 3.418 3.326 3.237 3.15 3.065 2.982 2.901 2.822 2.745 2.67 2.597 2.526 2.456 2.389 2.323 2.259 2.197 2.136 2.077 2.019 1.963 1.909 1.856 1.804 1.754 1.705 1.658 1.612 1.567 1.523 1.481 1.439 1.399 1.36 1.322 1.285 1.249 1.214 1.18 1.147 1.115 1.083 1.053 1.024 0.995 0.967 0.94 0.913 0.888 0.863 0.839 0.815 0.792 0.77 0.748 0.727 0.707 0.687 0.668 0.649 0.63 0.613 0.596

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.559" PeakHeight="110.0" Num="3" Error="0.0">
-23.169 4.966 -0.507
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.559" EndFrequency="9.45" PeakHeight="429.041" Num="5" zHalfNm="355.081" Error="4.571">
-224.409 -24.254 13.894 -6.576 3.661
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="81.357" Depth="0.31"/>
<TopsideChapman PeakHeight="429.041" PeakDensity="1107971.5" PeakScaleHeight="54.671" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
