<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-28 -059 22:30:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match</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" >
2026.02.28 (059) 22:30:00</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">
FF202605902282230009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.389" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.351" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.050" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="575.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="474.593" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="399.806" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.697" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="111.343" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="39.157" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="55.818" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="116.000" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.680" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="163">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
365.000 360.000 360.000 362.500 365.000 367.500 370.000 370.000 365.000 367.500 370.000 370.000 370.000 370.000 370.000 371.667 373.333 375.000 380.000 380.000 375.000 377.000 379.000 381.000 383.000 385.000 385.000 387.500 390.000 390.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 407.500 410.000 410.000 411.250 412.500 413.750 415.000 416.250 417.500 418.750 420.000 420.000 425.000 425.000 425.000 425.000 425.000 427.500 430.000 430.000 431.667 433.333 435.000 440.000 440.000 440.000 440.000 445.000 445.000 445.000 445.000 450.000 450.000 450.000 455.000 455.000 455.000 455.000 455.000 455.000 460.000 460.000 460.000 465.000 467.500 470.000 470.000 470.000 470.000 470.000 480.000 480.000 480.000 485.000 485.000 485.000 485.000 485.000 485.000 485.000 487.500 490.000 490.000 495.000 500.000 500.000 502.500 505.000 505.000 505.000 510.000 511.667 513.333 515.000 520.000 520.000 520.000 520.000 520.000 520.000 530.000 530.000 530.000 532.500 535.000 535.000 535.000 535.000 545.000 545.000 547.500 550.000 552.500 555.000 555.000 555.000 555.000 555.000 560.000 565.000 565.000 570.000 570.000 570.000 572.500 575.000 580.000 589.501 599.792 610.978 623.179 636.542 651.239
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 66 57 0 0 0 57 63 57 0 57 0 66 60 0 0 0 69 60 66 0 0 0 0 0 57 57 0 54 0 51 54 60 63 54 0 57 63 63 54 63 63 66 63 63 60 63 66 63 66 54 66 66 0 0 0 0 0 48 0 54 60 51 51 57 60 54 0 57 57 0 0 57 54 48 57 63 51 0 60 63 54 60 72 57 60 69 69 60 66 72 66 72 69 60 60 66 72 72 69 57 60 63 51 0 60 63 60 63 63 54 57 63 0 60 66 0 66 66 66 63 0 0 63 57 0 0 63 0 60 57 0 60 54 57 60 54 51 57 54 0 0 0 51 57 57 0 54 51 57 51 54 0 54 0 54 51 0 0 0 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 -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 1.953125 -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 -2.734375 -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 1.953125 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 1.171875 -0.390625 -1.171875 -0.390625 -0.390625 0.390625 1.171875 -1.171875 0.390625 0.390625 -1.171875 -1.171875 -0.390625 -0.390625 0.390625 1.953125 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 1.171875 -1.171875 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 1.953125 -2.734375 -0.390625 1.171875 1.171875 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.098 145.0 150.0 155.0 160.0 165.0 170.0 174.196 175.0 180.0 185.0 190.0 195.0 200.0 205.0 206.294 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 474.593 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.327 0.304 0.271 0.225 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.204 0.228 0.252 0.276 0.3 0.324 0.348 0.354 0.404 0.471 0.543 0.619 0.701 0.79 0.887 0.993 1.107 1.231 1.364 1.506 1.658 1.819 1.989 2.168 2.355 2.55 2.753 2.964 3.182 3.407 3.639 3.877 4.122 4.373 4.63 4.893 5.162 5.436 5.716 6.001 6.291 6.585 6.883 7.185 7.491 7.799 8.108 8.419 8.729 9.036 9.34 9.638 9.926 10.203 10.464 10.704 10.919 11.104 11.254 11.364 11.43 11.45 11.45 11.44 11.413 11.37 11.312 11.241 11.157 11.061 10.954 10.838 10.713 10.58 10.439 10.293 10.14 9.983 9.822 9.657 9.489 9.319 9.147 8.973 8.799 8.624 8.449 8.274 8.099 7.926 7.753 7.582 7.412 7.244 7.078 6.914 6.752 6.592 6.434 6.279 6.127 5.977 5.83 5.685 5.543 5.404 5.268 5.134 5.004 4.876 4.75 4.628 4.508 4.39 4.276 4.164 4.055 3.948 3.844 3.742 3.643 3.546 3.452 3.359 3.27 3.182 3.097 3.014 2.932 2.853 2.776 2.701 2.628 2.557 2.488 2.42 2.355 2.291 2.228 2.168 2.108 2.051 1.995 1.941 1.888 1.836 1.786 1.737 1.689 1.643 1.598 1.554 1.512 1.47 1.43 1.39 1.352 1.315 1.279 1.244 1.21 1.176 1.144 1.113 1.082 1.052 1.023 0.995

</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="11.45" PeakHeight="474.593" Num="5" zHalfNm="399.806" Error="3.814">
-257.619 -24.578 18.705 -6.921 2.114
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="96.294" Depth="0.154"/>
<TopsideChapman PeakHeight="474.593" PeakDensity="1626581.9" PeakScaleHeight="55.818" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
