<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-11 -070 11:50:00.000"
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: 95% PACIFIC flags: 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" >
2026.03.11 (070) 11:50:00</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">
FF202607003111150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="11.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.691" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.414" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.150" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="125.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" 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="2.966" 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="/" />
<Modeled Name="foF1p" Val="4.157" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="335.987" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="243.706" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.172" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.150" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="122.737" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.832" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="66.332" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="146.910" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.420" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="137">
<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 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 245.000 250.000 252.500 255.000 255.000 260.000 260.000 260.000 262.500 265.000 270.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 281.250 282.500 283.750 285.000 286.250 287.500 288.750 290.000 291.250 292.500 293.750 295.000 296.250 297.500 298.750 300.000 300.000 300.000 300.000 300.000 300.000 301.000 302.000 303.000 304.000 305.000 305.000 306.667 308.333 310.000 310.000 315.000 320.000 320.000 320.000 320.000 320.000 322.500 325.000 325.000 325.000 327.500 330.000 330.000 332.500 335.000 335.000 337.500 340.000 340.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 425.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 450.000 455.000 460.000 460.000 460.000 462.500 465.000 465.000 468.750 474.150 480.216 487.076 494.900 503.905 514.380 526.717 541.462 559.397
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 45 0 45 51 54 57 54 0 54 48 0 0 51 51 51 54 54 0 0 48 48 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 51 0 57 60 60 54 0 0 0 0 66 63 0 0 69 69 69 57 0 63 69 69 57 66 66 69 60 63 63 0 60 63 0 57 63 54 60 63 54 60 63 57 63 63 60 63 60 63 66 66 66 63 69 69 60 69 69 69 72 69 60 69 57 54 54 60 54 57 45 54 48 57 63 60 63 57 57 54 48 54 51 51 54 51 51 51 48 51 48 48 0 0 0 48 48 48 45 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 -2.734375 -1.953125 1.953125 2.734375 0.390625 -2.734375 -1.953125 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 -1.171875 -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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="21">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.000 120.000 123.750 127.500 131.250 135.000 130.000 130.000 125.000 120.000 120.000 120.000 118.750 117.500 116.250 115.000 115.000 115.000 115.000 115.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 0 0 0 48 54 48 0 48 60 57 0 0 0 57 54 0 51 48 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 0.390625 2.734375 -0.390625 2.734375 -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
</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" >
89.551 90.0 95.0 100.0 105.0 110.0 113.369 115.0 116.739 120.0 120.108 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 335.987 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.994 2.567 2.87 2.966 2.844 2.844 2.844 2.962 2.966 3.137 3.3 3.46 3.619 3.781 3.947 4.118 4.295 4.48 4.671 4.871 5.077 5.291 5.51 5.736 5.965 6.197 6.43 6.665 6.899 7.133 7.365 7.595 7.823 8.049 8.272 8.493 8.712 8.929 9.143 9.355 9.565 9.772 9.976 10.176 10.372 10.562 10.742 10.909 11.058 11.179 11.263 11.299 11.3 11.296 11.28 11.253 11.215 11.166 11.109 11.042 10.966 10.883 10.792 10.695 10.591 10.482 10.368 10.249 10.126 9.999 9.868 9.735 9.599 9.461 9.32 9.179 9.036 8.892 8.747 8.602 8.457 8.311 8.166 8.021 7.877 7.733 7.59 7.448 7.307 7.168 7.029 6.892 6.757 6.623 6.491 6.36 6.231 6.104 5.978 5.854 5.733 5.613 5.495 5.379 5.265 5.152 5.042 4.934 4.827 4.723 4.62 4.519 4.42 4.323 4.228 4.135 4.044 3.954 3.866 3.78 3.696 3.613 3.532 3.453 3.375 3.299 3.225 3.152 3.081 3.011 2.943 2.876 2.81 2.746 2.684 2.623 2.563 2.504 2.447 2.391 2.336 2.283 2.23 2.179 2.129 2.08 2.032 1.986 1.94 1.895 1.852 1.809 1.767 1.726 1.686 1.648 1.609 1.572 1.536 1.5 1.466 1.432 1.399 1.366 1.335 1.304 1.273 1.244 1.215 1.187 1.159 1.133 1.106 1.081 1.056 1.031 1.007 0.984 0.961 0.939 0.917 0.895 0.875 0.854 0.835 0.815

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.966" PeakHeight="110.0" Num="3" Error="0.0">
-30.166 12.66 -2.943
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.966" EndFrequency="11.3" PeakHeight="335.987" Num="5" zHalfNm="243.706" Error="4.305">
-185.289 -41.541 15.093 -6.808 2.666
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.108" Depth="0.122"/>
<TopsideChapman PeakHeight="335.987" PeakDensity="1584243.1" PeakScaleHeight="66.332" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
