<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-08 -067 11:00:00.000"
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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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) 11:00:00</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">
FF202606703081100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="10.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.841" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.395" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.900" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.950" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.310" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="98.590" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="130.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="96.048" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="5.953" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="410.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.666" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="314.705" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="239.503" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.017" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.200" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="102.979" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="34.650" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="55.457" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="127.420" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.270" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="125">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 251.667 253.333 255.000 255.833 256.667 257.500 258.333 259.167 260.000 265.000 265.000 265.000 265.000 265.000 270.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 282.500 285.000 285.000 285.000 285.000 290.000 290.000 295.000 295.000 295.000 296.111 297.222 298.333 299.444 300.556 301.667 302.778 303.889 305.000 306.667 308.333 310.000 310.000 310.000 312.500 315.000 316.429 317.857 319.286 320.714 322.143 323.571 325.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 360.000 360.000 365.000 365.000 365.000 365.000 365.000 365.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 420.000 420.000 425.000 430.000 435.000 435.000 439.394 444.406 450.174 456.884 464.787 474.233 485.721 499.996
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 0 0 57 0 0 0 57 0 54 57 0 57 57 51 57 48 0 0 54 60 54 51 51 0 0 63 69 69 69 69 69 60 63 69 0 0 63 0 0 0 0 0 60 0 0 57 54 63 0 66 0 57 0 57 0 0 57 63 51 54 60 63 66 69 69 69 72 63 69 69 72 72 69 69 69 69 72 72 72 66 69 66 69 63 63 60 60 69 63 51 60 69 66 60 66 69 72 63 57 51 60 57 54 57 63 57 57 54 57 54 45 63 45 54 60 63 60 57 51 51 45 45 51 42
</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 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 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="8">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
98.590 99.166 99.777 100.429 101.124 101.869 102.671 103.539
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 0 57 0 54 0 60
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 1.171875 0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="15">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
155.000 150.000 150.000 145.000 140.000 135.000 135.000 135.000 130.000 130.000 130.000 130.000 130.000 130.000 130.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 54 45 0 0 60 63 66 60 60 54 57 0 60 66
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 2.734375 -0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.0 95.0 96.048 100.0 100.815 105.0 105.581 110.0 110.348 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 314.705 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.273 2.31 2.237 2.203 2.203 2.203 2.302 2.31 2.498 2.683 2.86 3.033 3.206 3.38 3.555 3.734 3.915 4.1 4.288 4.481 4.677 4.878 5.082 5.291 5.504 5.721 5.942 6.167 6.395 6.628 6.863 7.103 7.345 7.591 7.839 8.089 8.342 8.596 8.85 9.104 9.355 9.601 9.84 10.065 10.27 10.447 10.585 10.672 10.7 10.7 10.691 10.665 10.625 10.571 10.504 10.424 10.334 10.234 10.124 10.006 9.88 9.748 9.61 9.466 9.318 9.166 9.011 8.853 8.692 8.53 8.367 8.203 8.038 7.873 7.709 7.545 7.382 7.22 7.059 6.899 6.742 6.585 6.431 6.279 6.13 5.982 5.837 5.694 5.553 5.416 5.28 5.147 5.017 4.89 4.765 4.642 4.523 4.405 4.291 4.179 4.069 3.963 3.858 3.756 3.656 3.559 3.464 3.372 3.282 3.194 3.108 3.024 2.942 2.863 2.785 2.71 2.636 2.565 2.495 2.427 2.361 2.296 2.234 2.173 2.113 2.055 1.999 1.944 1.891 1.839 1.788 1.739 1.691 1.645 1.599 1.555 1.512 1.471 1.43 1.391 1.352 1.315 1.278 1.243 1.209 1.175 1.143 1.111 1.08 1.051 1.021 0.993 0.966 0.939 0.913 0.888 0.863 0.839 0.816 0.793 0.771 0.75 0.729 0.709 0.689 0.67 0.651 0.633 0.616 0.599 0.582 0.566 0.55 0.535 0.52 0.506 0.492 0.478 0.465 0.452 0.439 0.427 0.415 0.404 0.392 0.382 0.371

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.31" PeakHeight="96.048" Num="3" Error="2.028">
-8.778 3.482 -0.752
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.31" EndFrequency="10.7" PeakHeight="314.705" Num="5" zHalfNm="239.503" Error="2.29">
-174.02 -43.473 14.07 -1.783 0.849
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="14.3" Depth="0.107"/>
<TopsideChapman PeakHeight="314.705" PeakDensity="1420471.5" PeakScaleHeight="55.457" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
