<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-27 -086 17:50:00.000"
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="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: 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" >
2026.03.27 (086) 17:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608603271750009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="12.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.504" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.424" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.950" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.210" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="195.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="195.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="107.883" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="99.958" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="9.720" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="500.000" 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="3.088" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.217" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="384.809" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="282.621" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.352" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="136.951" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="61.885" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.759" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="177.610" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.240" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="161">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
195.000 200.000 200.000 200.000 210.000 205.000 218.333 231.667 245.000 245.000 245.000 248.750 252.500 256.250 260.000 260.000 270.000 275.000 275.000 275.000 278.750 282.500 286.250 290.000 300.000 300.000 300.000 305.000 310.000 310.000 310.000 315.000 320.000 325.000 325.000 326.667 328.333 330.000 330.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 345.000 347.500 350.000 350.000 352.500 355.000 355.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 377.000 379.000 381.000 383.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 396.667 398.333 400.000 405.000 405.000 407.500 410.000 410.000 411.667 413.333 415.000 415.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 435.000 435.000 435.000 435.000 435.000 440.000 440.000 440.000 440.000 440.000 445.000 445.000 445.000 445.000 445.000 445.000 447.500 450.000 452.143 454.286 456.429 458.571 460.714 462.857 465.000 465.000 465.000 470.000 470.000 470.000 470.000 470.000 472.500 475.000 485.000 485.000 485.000 495.000 495.000 500.000 500.000 500.000 500.000 510.000 510.000 514.369 519.079 524.173 529.697 535.711 542.282 549.490 557.435 566.233 576.031 587.010 599.396 613.479 629.633 648.350
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 51 57 54 45 51 51 0 45 54 51 0 51 0 60 63 54 45 54 0 0 51 0 0 48 57 54 0 60 63 0 0 60 48 57 0 0 51 57 57 0 54 60 0 60 60 63 57 0 57 54 0 60 54 57 57 60 60 60 57 60 63 63 60 60 60 51 0 0 51 0 57 54 60 63 60 66 66 0 0 63 63 63 0 57 60 0 0 63 63 66 69 66 69 69 66 63 69 0 66 66 69 66 66 66 66 66 66 66 66 63 60 63 63 0 60 60 0 60 0 0 0 0 0 0 45 0 57 45 51 57 60 0 0 54 45 54 54 42 54 48 57 54 0 57 54 48 54 0 57 57 57 54 54 51 0 51 51 0 42 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.953125 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="6">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.95 3.0 3.05 3.1 3.15 3.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
107.883 108.839 109.948 111.278 112.951 115.239
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 0 0 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 1.953125 0.390625 1.953125 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 99.958 100.0 102.784 105.0 105.61 108.436 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 384.809 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.76 3.21 3.21 3.083 3.083 3.083 3.21 3.248 3.372 3.499 3.627 3.757 3.889 4.021 4.156 4.291 4.428 4.566 4.705 4.846 4.988 5.131 5.276 5.423 5.572 5.722 5.875 6.029 6.186 6.345 6.507 6.671 6.839 7.009 7.182 7.358 7.537 7.72 7.906 8.096 8.289 8.487 8.687 8.892 9.1 9.311 9.525 9.742 9.96 10.18 10.399 10.617 10.832 11.041 11.241 11.431 11.606 11.763 11.897 12.006 12.086 12.134 12.15 12.15 12.145 12.13 12.105 12.072 12.031 11.982 11.925 11.861 11.79 11.713 11.63 11.542 11.449 11.35 11.247 11.141 11.03 10.916 10.799 10.679 10.557 10.432 10.305 10.177 10.047 9.915 9.783 9.65 9.516 9.381 9.246 9.111 8.976 8.841 8.706 8.572 8.438 8.304 8.171 8.039 7.908 7.778 7.649 7.521 7.394 7.268 7.143 7.02 6.898 6.777 6.658 6.54 6.424 6.309 6.195 6.083 5.973 5.864 5.757 5.651 5.547 5.444 5.343 5.243 5.145 5.048 4.953 4.86 4.768 4.677 4.588 4.501 4.415 4.33 4.247 4.166 4.085 4.007 3.929 3.853 3.778 3.705 3.633 3.562 3.492 3.424 3.357 3.292 3.227 3.164 3.101 3.04 2.981 2.922 2.864 2.808 2.752 2.698 2.644 2.592 2.541 2.49 2.441 2.392 2.345 2.298 2.253 2.208 2.164 2.121 2.078 2.037 1.996 1.957 1.917 1.879 1.842 1.805 1.769 1.733 1.699 1.665 1.631

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.21" PeakHeight="99.958" Num="3" Error="3.034">
-14.758 6.295 -1.495
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.21" EndFrequency="12.15" PeakHeight="384.809" Num="5" zHalfNm="282.621" Error="5.453">
-225.811 -62.068 10.916 1.379 -0.789
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.478" Depth="0.127"/>
<TopsideChapman PeakHeight="384.809" PeakDensity="1831544.6" PeakScaleHeight="76.759" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
