<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-25 -084 00:10:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, F2x cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Trace overlaps while constructing baseline</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" >
2026.03.25 (084) 00:10:00</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">
FF202608403250010009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.666" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.129" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="355.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="355.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="492.019" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="424.165" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="380.172" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.436" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="67.386" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="14.939" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="32.778" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="78.640" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.180" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="122">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
355.000 360.000 365.000 370.000 375.000 380.000 385.000 360.000 365.000 360.000 362.000 364.000 366.000 368.000 370.000 372.000 374.000 376.000 378.000 380.000 385.000 390.000 392.500 395.000 395.000 395.000 395.000 400.000 400.000 402.500 405.000 407.500 410.000 410.000 410.882 411.765 412.647 413.529 414.412 415.294 416.176 417.059 417.941 418.824 419.706 420.588 421.471 422.353 423.235 424.118 425.000 425.882 426.765 427.647 428.529 429.412 430.294 431.176 432.059 432.941 433.824 434.706 435.588 436.471 437.353 438.235 439.118 440.000 440.000 440.000 440.000 441.667 443.333 445.000 446.667 448.333 450.000 451.667 453.333 455.000 455.000 450.000 445.000 445.000 470.000 467.500 465.000 463.750 462.500 461.250 460.000 460.385 460.769 461.154 461.538 461.923 462.308 462.692 463.077 463.462 463.846 464.231 464.615 465.000 465.000 465.000 460.000 470.000 470.000 472.500 475.000 477.500 480.000 482.500 485.000 486.693 488.929 492.019 496.568 503.929 517.873 554.380
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 57 57 57 0 63 54 57 66 54 0 0 0 57 60 0 57 51 0 57 0 54 0 60 63 0 57 54 0 0 60 0 57 60 0 0 0 0 51 0 0 0 0 0 0 0 0 0 0 0 0 51 54 0 0 51 0 54 0 0 0 0 0 0 0 0 48 54 0 57 54 0 0 51 54 48 0 51 0 48 54 0 51 51 54 0 54 0 0 0 51 54 54 54 54 57 48 51 54 54 48 54 51 57 51 51 51 48 48 0 51 0 48 48 0 48 51 0 51 48 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 -1.171875 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 -2.734375 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 -1.953125 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -1.953125 -0.390625 0.390625 -2.734375 1.171875 0.390625 1.171875 -1.171875 -1.171875 0.390625 1.171875 2.734375 1.171875 0.390625 -1.953125 -1.171875 0.390625 -1.171875 -0.390625 0.390625 -0.390625 -1.171875 0.390625 -0.390625 1.171875 -1.171875 0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 0.390625 -0.390625 -1.953125 0.390625 -0.390625 0.390625 0.390625 0.390625 2.734375 -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 1.171875 0.390625 2.734375 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 2.734375 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="162">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.099 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.197 185.0 190.0 195.0 200.0 205.0 210.0 215.0 218.296 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 424.165 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.333 0.315 0.291 0.258 0.212 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.212 0.233 0.255 0.276 0.297 0.319 0.34 0.354 0.38 0.462 0.552 0.649 0.753 0.863 0.98 1.104 1.233 1.368 1.508 1.655 1.807 1.965 2.129 2.299 2.476 2.659 2.848 3.045 3.249 3.46 3.679 3.906 4.141 4.386 4.64 4.904 5.178 5.463 5.759 6.068 6.388 6.721 7.065 7.42 7.781 8.141 8.486 8.785 8.991 9.05 9.049 9.023 8.96 8.865 8.741 8.593 8.424 8.237 8.036 7.824 7.602 7.374 7.142 6.908 6.672 6.437 6.203 5.972 5.745 5.522 5.303 5.09 4.883 4.681 4.485 4.296 4.113 3.936 3.766 3.602 3.444 3.292 3.146 3.006 2.871 2.743 2.619 2.501 2.387 2.279 2.175 2.076 1.981 1.891 1.804 1.721 1.642 1.566 1.494 1.425 1.36 1.297 1.237 1.18 1.125 1.073 1.023 0.976 0.931 0.887 0.846 0.807 0.769 0.734 0.7 0.667 0.636 0.607 0.578 0.552 0.526 0.501 0.478 0.456 0.435 0.414 0.395 0.377 0.359 0.343 0.327 0.311 0.297 0.283 0.27 0.257 0.245 0.234 0.223 0.213 0.203

</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="9.05" PeakHeight="424.165" Num="5" zHalfNm="380.172" Error="1.143">
-177.409 -50.523 28.008 -6.705 0.76
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="108.296" Depth="0.154"/>
<TopsideChapman PeakHeight="424.165" PeakDensity="1016160.06" PeakScaleHeight="32.778" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
