<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-27 -058 16:50:00.000"
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: 90% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.02.27 (058) 16:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202605802271650009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="12.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.553" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.036" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" Name="h`F2" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="492.248" 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="3.295" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.316" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="377.325" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="276.179" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.046" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="136.146" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="64.704" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="75.655" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="170.430" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.330" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="150">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 280.000 285.000 285.000 286.875 288.750 290.625 292.500 294.375 296.250 298.125 300.000 305.000 305.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 322.500 325.000 330.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 356.250 357.500 358.750 360.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 395.000 397.500 400.000 400.000 400.000 402.500 405.000 407.500 410.000 410.000 410.000 411.111 412.222 413.333 414.444 415.556 416.667 417.778 418.889 420.000 425.000 425.000 427.500 430.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 435.000 440.000 440.000 440.000 440.000 442.500 445.000 447.500 450.000 452.500 455.000 455.000 456.000 457.000 458.000 459.000 460.000 465.000 467.500 470.000 472.500 475.000 477.500 480.000 485.000 490.000 490.000 485.000 488.496 492.248 496.286 500.644 505.361 510.485 516.068 522.178 528.890 536.301 544.523 553.699 564.004 575.660 588.953 604.253 622.050 643.012
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 54 54 57 0 0 0 0 0 54 0 48 57 60 57 60 63 63 63 66 63 60 60 57 54 48 0 54 51 51 51 51 54 54 48 51 51 51 48 51 51 48 45 0 51 48 0 0 0 48 51 57 54 63 66 63 66 66 60 0 66 60 0 63 57 0 60 63 60 60 63 57 57 60 48 57 45 63 0 63 0 63 66 60 0 0 0 60 0 0 0 0 60 60 60 0 51 54 0 48 48 48 45 48 51 51 51 51 48 0 0 0 48 0 48 45 0 0 42 0 0 45 0 0 0 0 0 45 51 51 51 0 0 0 0 0 0 42 0 0 0 0 51 48 54 0 45 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 -1.953125 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -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 -0.390625 -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 -2.734375 -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 -0.390625 1.171875 2.734375 1.171875 -1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 2.734375
</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" >
89.497 90.0 95.0 100.0 105.0 110.0 111.941 113.882 115.0 115.823 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 377.325 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.216 2.852 3.188 3.295 3.173 3.173 3.243 3.295 3.435 3.593 3.744 3.892 4.037 4.182 4.327 4.472 4.619 4.767 4.917 5.069 5.224 5.382 5.542 5.706 5.873 6.043 6.217 6.395 6.577 6.762 6.951 7.144 7.341 7.541 7.746 7.954 8.166 8.381 8.6 8.822 9.046 9.273 9.501 9.732 9.963 10.195 10.426 10.655 10.881 11.104 11.32 11.528 11.726 11.91 12.078 12.226 12.35 12.447 12.513 12.546 12.55 12.548 12.538 12.517 12.486 12.447 12.399 12.342 12.278 12.207 12.129 12.044 11.953 11.857 11.755 11.649 11.538 11.423 11.305 11.183 11.058 10.93 10.8 10.667 10.533 10.397 10.26 10.121 9.981 9.841 9.7 9.559 9.417 9.275 9.134 8.993 8.852 8.711 8.571 8.432 8.294 8.157 8.02 7.885 7.751 7.618 7.486 7.356 7.227 7.099 6.973 6.848 6.725 6.604 6.484 6.365 6.248 6.133 6.02 5.908 5.797 5.689 5.582 5.476 5.372 5.27 5.17 5.071 4.974 4.878 4.784 4.692 4.601 4.512 4.424 4.338 4.253 4.17 4.088 4.008 3.929 3.852 3.776 3.701 3.628 3.556 3.485 3.416 3.348 3.282 3.216 3.152 3.089 3.027 2.967 2.907 2.849 2.792 2.736 2.681 2.627 2.574 2.522 2.472 2.422 2.373 2.325 2.278 2.232 2.187 2.143 2.099 2.057 2.015 1.974 1.934 1.895 1.857 1.819 1.782 1.746 1.711 1.676 1.642 1.609 1.576

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.295" PeakHeight="110.0" Num="3" Error="0.0">
-30.431 13.048 -3.12
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.295" EndFrequency="12.55" PeakHeight="377.325" Num="5" zHalfNm="276.179" Error="3.133">
-219.208 -53.277 9.758 0.429 0.796
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.823" Depth="0.122"/>
<TopsideChapman PeakHeight="377.325" PeakDensity="1954125.2" PeakScaleHeight="75.655" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
