<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-18 -077 22:00:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o 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" >
2026.03.18 (077) 22:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607703182200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.734" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.293" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="360.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="360.000" 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="9.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="420.867" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="380.261" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.812" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="63.017" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="14.751" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="30.488" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="78.120" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.040" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="129">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.85 2.9 2.95 3.0 3.05 3.1 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
360.000 360.000 365.000 370.000 367.500 365.000 370.000 370.000 370.000 371.354 372.708 374.063 375.417 376.771 378.125 379.479 380.833 382.188 383.542 384.896 386.250 387.604 388.958 390.313 391.667 393.021 394.375 395.729 397.083 398.438 399.792 401.146 402.500 403.854 405.208 406.563 407.917 409.271 410.625 411.979 413.333 414.688 416.042 417.396 418.750 420.104 421.458 422.813 424.167 425.521 426.875 428.229 429.583 430.938 432.292 433.646 435.000 432.500 430.000 430.833 431.667 432.500 433.333 434.167 435.000 435.000 440.000 440.000 440.000 440.000 440.000 440.000 440.000 445.000 445.000 445.000 445.000 445.000 445.000 445.000 445.000 447.500 450.000 452.500 455.000 455.000 455.000 455.000 455.000 455.000 455.000 460.000 461.000 462.000 463.000 464.000 465.000 465.000 465.000 465.000 467.500 470.000 470.000 470.000 470.000 470.000 475.000 475.000 475.000 475.000 470.000 465.000 460.000 460.000 460.000 462.500 465.000 465.000 465.000 465.000 465.000 470.000 470.649 471.546 472.866 475.000 479.040 489.593 587.956
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 66 60 54 0 66 60 0 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 51 57 57 0 0 0 60 0 48 0 63 0 0 0 0 0 60 63 66 60 63 63 63 66 69 72 75 75 72 0 72 72 66 0 0 0 66 66 60 66 0 0 69 63 0 0 0 0 63 63 63 66 0 57 57 0 66 63 60 57 45 63 66 0 57 63 69 57 63 0 66 66 63 69 69 54 57 57 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="155">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 140.255 145.0 150.0 155.0 160.0 165.0 170.0 170.509 175.0 180.0 185.0 190.0 195.0 200.0 200.764 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 420.867 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.323 0.297 0.259 0.203 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.223 0.248 0.274 0.299 0.325 0.35 0.354 0.425 0.515 0.608 0.703 0.802 0.903 1.007 1.114 1.225 1.339 1.456 1.578 1.704 1.834 1.969 2.109 2.254 2.404 2.56 2.723 2.891 3.067 3.249 3.439 3.637 3.844 4.059 4.284 4.52 4.766 5.025 5.295 5.58 5.878 6.192 6.523 6.871 7.236 7.618 8.013 8.411 8.79 9.097 9.246 9.25 9.234 9.174 9.075 8.942 8.779 8.592 8.385 8.161 7.924 7.678 7.426 7.169 6.91 6.651 6.394 6.14 5.889 5.644 5.404 5.171 4.944 4.724 4.511 4.306 4.108 3.918 3.735 3.56 3.391 3.23 3.076 2.928 2.787 2.652 2.524 2.401 2.284 2.172 2.066 1.964 1.868 1.776 1.688 1.605 1.525 1.45 1.378 1.31 1.245 1.183 1.124 1.068 1.015 0.965 0.917 0.871 0.828 0.786 0.747 0.71 0.675 0.641 0.609 0.579 0.55 0.522 0.496 0.471 0.448 0.426 0.404 0.384 0.365 0.347 0.329 0.313 0.297 0.282 0.268 0.255 0.242 0.23 0.219 0.208

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="9.25" PeakHeight="420.867" Num="5" zHalfNm="380.261" Error="1.928">
-182.136 -65.483 32.401 -4.756 -0.129
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="90.764" Depth="0.154"/>
<TopsideChapman PeakHeight="420.867" PeakDensity="1061569.5" PeakScaleHeight="30.488" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
