<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-06 -065 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="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 0 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" >
2026.03.06 (065) 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">
FF202606503061240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="32" >
<URSI ID="00" Val="9.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.411" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.270" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.700" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.750" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.210" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="94.519" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="100.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="94.676" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="4.565" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="405.000" 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="3.166" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.255" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="370.891" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="229.782" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.232" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.250" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="178.562" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="48.411" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="97.348" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="223.820" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.360" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="103">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 215.000 221.667 228.333 235.000 241.667 248.333 255.000 261.667 268.333 275.000 280.000 285.000 290.000 292.500 295.000 300.000 300.000 300.000 300.000 310.000 310.000 315.000 315.000 315.000 317.500 320.000 322.500 325.000 327.500 330.000 332.500 335.000 337.500 340.000 340.000 340.000 340.000 345.000 345.000 350.000 352.500 355.000 357.500 360.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 395.000 395.000 400.000 405.000 405.000 410.000 415.000 425.000 430.000 430.000 435.000 450.000 455.000 455.000 460.000 475.000 480.000 485.000 485.000 500.000 505.000 510.000 515.000 520.000 525.000 525.000 530.000 535.000 545.000 550.000 550.000 555.000 565.000 565.000 575.000 580.000 590.000 595.000 600.895 607.407 614.639 622.716 631.797 642.081 653.824 667.359
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 45 0 0 45 0 0 0 51 0 51 54 54 54 0 60 57 51 54 57 54 63 57 63 63 0 54 0 54 0 54 0 57 0 48 60 60 63 60 63 0 0 51 0 54 66 57 63 57 66 57 63 54 57 54 57 0 51 57 63 63 60 60 60 60 63 66 69 57 60 63 63 54 57 63 66 54 60 60 66 66 69 69 66 57 57 60 60 60 57 57 57 57 57 57 54 57 57 57 54 54 0 0
</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 0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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>
<Trace Type="standard" Layer="E" Polarization="O" Num="10">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
94.519 95.090 95.710 96.388 97.138 97.977 98.931 100.039 101.367 103.037
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 0 0 66 0 60 0 63 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 1.953125 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="10">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 60 0 57 0 0 51 0 0 51
</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
</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 94.676 95.0 97.165 99.655 100.0 102.144 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 370.891 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 3.21 3.208 3.086 3.086 3.103 3.21 3.282 3.404 3.524 3.646 3.769 3.896 4.028 4.163 4.304 4.449 4.599 4.754 4.911 5.07 5.229 5.389 5.547 5.702 5.855 6.004 6.15 6.293 6.432 6.567 6.7 6.829 6.956 7.08 7.201 7.321 7.438 7.554 7.668 7.78 7.891 8.001 8.109 8.217 8.324 8.43 8.535 8.64 8.744 8.847 8.95 9.051 9.151 9.249 9.344 9.433 9.514 9.581 9.629 9.65 9.65 9.648 9.642 9.631 9.615 9.595 9.571 9.543 9.511 9.475 9.436 9.393 9.347 9.299 9.247 9.192 9.135 9.076 9.014 8.95 8.883 8.815 8.745 8.674 8.601 8.526 8.451 8.374 8.295 8.216 8.136 8.055 7.974 7.892 7.809 7.726 7.642 7.558 7.474 7.389 7.305 7.22 7.136 7.051 6.967 6.882 6.798 6.714 6.63 6.547 6.464 6.382 6.299 6.218 6.136 6.056 5.975 5.896 5.817 5.738 5.66 5.583 5.507 5.431 5.356 5.281 5.207 5.134 5.062 4.99 4.919 4.849 4.779 4.711 4.643 4.576 4.509 4.444 4.379 4.315 4.251 4.189 4.127 4.066 4.005 3.946 3.887 3.829 3.772 3.715 3.659 3.604 3.55 3.496 3.443 3.391 3.34 3.289 3.239 3.189 3.141 3.093 3.045 2.999 2.953 2.907 2.863 2.818 2.775 2.732 2.69 2.648 2.607 2.567 2.527 2.488 2.449 2.411 2.374 2.337 2.3 2.264 2.229 2.194 2.16 2.126 2.093

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.21" PeakHeight="94.676" Num="3" Error="0.671">
-6.931 2.957 -0.702
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.21" EndFrequency="9.65" PeakHeight="370.891" Num="5" zHalfNm="229.782" Error="7.932">
-234.835 -53.842 31.311 -15.496 4.115
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.468" Depth="0.124"/>
<TopsideChapman PeakHeight="370.891" PeakDensity="1155366.0" PeakScaleHeight="97.348" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
