<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-09 -068 12:40:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: 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" >
2026.03.09 (068) 12:40:00</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">
FF202606803091240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.708" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.655" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.850" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" Name="h`Es" 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="0.700" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="471.243" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.169" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.256" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="332.065" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="241.582" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.232" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.350" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="116.478" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="42.168" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="64.278" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="153.800" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.200" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="120">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 275.000 277.500 280.000 282.500 285.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 290.000 290.000 295.000 297.500 300.000 302.500 305.000 305.000 305.000 305.000 305.000 305.000 310.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 340.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 400.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 430.000 430.000 435.000 435.000 440.000 440.000 442.500 445.000 445.000 450.000 455.000 455.000 456.014 457.145 458.415 459.852 461.490 463.376 465.570 468.155 471.243 475.000 479.668 485.624 493.487 504.347 520.322 546.138
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 0 48 51 51 51 54 51 48 51 0 60 0 57 60 60 0 57 0 0 60 57 54 60 0 0 0 51 57 60 63 63 60 63 51 0 0 63 63 63 66 0 48 0 63 66 60 66 54 63 66 69 66 69 63 66 57 66 69 63 69 69 66 57 63 69 63 66 60 66 60 66 57 66 66 66 66 63 57 63 63 60 63 60 63 66 63 63 60 63 54 57 63 60 60 60 54 60 51 57 60 54 45 51 54 51 54 51 48 48 0 48 45 48 48 45 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 -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 -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 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 0.390625 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="31">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 115.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 57 57 60 57 60 60 57 60 0 0 54 51 51 0 0 0 0 0 57 0 48 0 57 0 66 66 66 54 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
</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" >
89.518 90.0 95.0 100.0 105.0 110.0 112.476 114.952 115.0 117.428 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 332.065 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.131 2.743 3.066 3.169 3.047 3.047 3.049 3.169 3.266 3.442 3.609 3.774 3.937 4.102 4.268 4.438 4.61 4.786 4.966 5.148 5.334 5.523 5.714 5.908 6.102 6.298 6.495 6.693 6.89 7.088 7.286 7.483 7.68 7.877 8.074 8.27 8.467 8.663 8.859 9.056 9.252 9.449 9.645 9.841 10.036 10.229 10.416 10.594 10.752 10.876 10.943 10.95 10.948 10.934 10.909 10.872 10.824 10.767 10.7 10.624 10.541 10.45 10.352 10.247 10.137 10.022 9.902 9.778 9.649 9.518 9.384 9.247 9.108 8.967 8.825 8.681 8.537 8.392 8.246 8.101 7.956 7.811 7.666 7.522 7.379 7.237 7.096 6.956 6.818 6.681 6.545 6.411 6.279 6.149 6.02 5.893 5.768 5.645 5.523 5.404 5.286 5.171 5.058 4.946 4.837 4.729 4.624 4.52 4.419 4.319 4.222 4.126 4.032 3.94 3.85 3.762 3.675 3.591 3.508 3.427 3.348 3.27 3.194 3.12 3.047 2.976 2.906 2.838 2.772 2.707 2.643 2.581 2.52 2.461 2.403 2.346 2.291 2.237 2.184 2.132 2.082 2.032 1.984 1.937 1.891 1.846 1.802 1.759 1.718 1.677 1.637 1.598 1.56 1.522 1.486 1.451 1.416 1.382 1.349 1.317 1.286 1.255 1.225 1.196 1.167 1.139 1.112 1.085 1.059 1.034 1.009 0.985 0.961 0.938 0.916 0.894 0.873 0.852 0.831 0.811 0.792 0.773 0.754 0.736 0.719 0.701

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.169" PeakHeight="110.0" Num="3" Error="0.0">
-30.333 12.905 -3.054
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.169" EndFrequency="10.95" PeakHeight="332.065" Num="5" zHalfNm="241.582" Error="2.388">
-176.2 -54.558 20.293 -6.212 2.04
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.428" Depth="0.122"/>
<TopsideChapman PeakHeight="332.065" PeakDensity="1487624.1" PeakScaleHeight="64.278" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
