<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-23 -082 22:10:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.03.23 (082) 22:10:00</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">
FF202608203232210009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.745" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.333" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="10.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="461.275" 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="3.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="381.555" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="328.758" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.685" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="78.025" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="25.617" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="39.507" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="79.620" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.820" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="147">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 315.000 315.000 315.000 315.000 315.000 315.000 316.000 317.000 318.000 319.000 320.000 315.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 327.500 330.000 330.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 337.500 340.000 335.000 335.000 335.000 335.000 337.500 340.000 340.000 342.500 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 347.500 350.000 345.000 347.500 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 355.000 357.500 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 380.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 407.500 410.000 412.500 415.000 415.000 416.667 418.333 420.000 425.000 426.667 428.333 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 446.339 447.816 449.453 451.276 453.321 455.630 458.258 461.275 464.776 468.886 473.780 479.705 487.027 496.304 508.440
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 0 0 54 54 0 0 0 0 0 0 48 48 0 54 57 0 57 0 60 0 51 51 63 57 0 0 0 0 0 0 63 60 0 63 66 0 51 72 0 0 72 0 75 75 0 63 66 0 72 54 0 75 78 0 72 75 0 81 72 75 66 63 69 69 0 78 60 69 0 72 75 63 0 63 78 81 72 0 78 78 84 81 78 78 69 72 75 75 69 66 51 57 60 66 72 75 69 69 51 69 66 63 69 69 63 69 63 63 60 63 0 63 54 60 63 0 0 60 57 0 0 60 60 57 57 54 54 51 51 0 45 45 48 48 48 48 42 45 48 45 42 42 0 45
</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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -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 -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 2.734375 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="177">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.281 145.0 150.0 155.0 160.0 165.0 170.0 172.562 175.0 180.0 185.0 190.0 195.0 200.0 203.843 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 381.555 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0
</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 0.325 0.301 0.266 0.216 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.212 0.237 0.261 0.286 0.31 0.335 0.354 0.374 0.466 0.57 0.688 0.824 0.98 1.156 1.354 1.575 1.817 2.081 2.366 2.67 2.993 3.333 3.691 4.063 4.451 4.852 5.266 5.692 6.127 6.57 7.02 7.473 7.926 8.375 8.815 9.24 9.642 10.013 10.342 10.62 10.836 10.98 11.046 11.05 11.042 11.003 10.934 10.838 10.718 10.576 10.416 10.239 10.047 9.844 9.631 9.41 9.183 8.95 8.715 8.477 8.239 8.0 7.762 7.526 7.293 7.062 6.835 6.611 6.392 6.177 5.968 5.763 5.563 5.368 5.179 4.995 4.816 4.642 4.474 4.311 4.153 4.001 3.853 3.71 3.572 3.439 3.31 3.186 3.066 2.95 2.839 2.731 2.628 2.528 2.432 2.339 2.25 2.164 2.081 2.001 1.925 1.851 1.78 1.711 1.646 1.582 1.521 1.463 1.406 1.352 1.3 1.25 1.202 1.155 1.111 1.068 1.026 0.987 0.948 0.912 0.877 0.843 0.81 0.779 0.749 0.72 0.692 0.665 0.639 0.614 0.591 0.568 0.546 0.525 0.504 0.485 0.466 0.448 0.431 0.414 0.398 0.382 0.368 0.353 0.34 0.326 0.314 0.302 0.29 0.279 0.268 0.257 0.248 0.238 0.229 0.22 0.211 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="11.05" PeakHeight="381.555" Num="5" zHalfNm="328.758" Error="2.195">
-174.234 -9.453 8.377 -3.329 0.927
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="93.843" Depth="0.154"/>
<TopsideChapman PeakHeight="381.555" PeakDensity="1514919.4" PeakScaleHeight="39.507" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
