<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-07 -066 23:20:00.000"
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" >
2026.03.07 (066) 23:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606603072320009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.501" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.016" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" 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="0.600" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="515.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="443.544" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="372.035" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.856" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="104.984" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="35.474" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="53.642" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="104.690" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.960" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="166">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 341.667 343.333 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 347.000 349.000 351.000 353.000 355.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 355.000 360.000 365.000 365.000 365.833 366.667 367.500 368.333 369.167 370.000 365.000 367.500 370.000 372.500 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 380.000 380.000 382.500 385.000 387.500 390.000 390.000 391.250 392.500 393.750 395.000 395.000 390.000 392.500 395.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 400.000 400.000 400.000 402.500 405.000 405.000 405.000 405.000 406.250 407.500 408.750 410.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 420.000 425.000 425.000 427.500 430.000 430.000 430.000 432.500 435.000 435.000 440.000 440.000 440.000 440.000 440.000 445.000 445.000 450.000 450.000 450.000 450.000 450.000 455.000 455.000 460.000 460.000 460.000 460.000 460.000 460.000 465.000 465.000 470.000 470.000 470.000 480.000 482.500 485.000 480.000 482.500 485.000 490.000 495.000 495.000 495.000 495.000 495.000 495.000 500.000 505.000 510.000 510.000 510.000 515.000 515.000 518.846 523.127 527.918 533.319 539.453 546.480 554.611 564.127 575.417 589.027 605.752 626.803
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 0 0 0 63 0 0 0 0 0 0 72 69 69 0 0 57 0 60 0 0 0 60 0 60 0 0 0 0 54 60 0 0 0 0 0 54 60 0 0 0 60 63 0 66 69 69 75 69 69 69 69 69 75 60 72 0 69 57 63 72 0 0 0 57 72 75 66 81 72 0 78 66 69 69 78 78 0 75 66 75 75 75 78 0 0 0 75 72 75 75 78 81 75 75 75 78 63 78 78 75 72 63 75 78 78 63 69 72 57 57 78 72 69 69 75 63 0 69 54 72 66 66 57 0 60 60 60 63 66 66 66 69 69 60 0 51 72 0 63 66 54 60 0 66 57 51 51 54 57 0 54 54 51 48 51 0 51 51 48 45 51 54 51 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 -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 -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 -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 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 1.171875 0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 1.171875 1.171875 1.171875 1.953125 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 0.390625 1.171875 1.953125 1.953125 0.390625 1.171875 1.171875 1.171875 1.953125 0.390625 -0.390625 0.390625 1.171875 0.390625 -0.390625 0.390625 -2.734375 1.171875 1.953125 1.953125 1.953125 1.171875 1.171875 1.953125 1.953125 1.171875 0.390625 1.953125 0.390625 0.390625 0.390625 1.953125 1.171875 1.171875 1.171875 1.953125 1.171875 1.171875 1.953125 1.953125 1.953125 -0.390625 -0.390625 -0.390625 0.390625 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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.559 145.0 150.0 155.0 160.0 165.0 170.0 175.0 179.118 180.0 185.0 190.0 195.0 200.0 205.0 210.0 213.677 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 443.544 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.344 0.331 0.311 0.284 0.247 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.204 0.226 0.248 0.271 0.293 0.315 0.338 0.354 0.372 0.44 0.515 0.597 0.688 0.789 0.901 1.024 1.161 1.311 1.475 1.654 1.847 2.056 2.28 2.518 2.771 3.038 3.318 3.61 3.915 4.23 4.556 4.892 5.236 5.587 5.944 6.306 6.672 7.039 7.406 7.772 8.133 8.489 8.835 9.17 9.49 9.792 10.073 10.33 10.559 10.758 10.922 11.05 11.14 11.19 11.2 11.199 11.185 11.152 11.104 11.04 10.962 10.871 10.768 10.654 10.53 10.398 10.258 10.11 9.957 9.798 9.634 9.467 9.297 9.124 8.948 8.772 8.594 8.416 8.238 8.06 7.883 7.706 7.531 7.357 7.185 7.014 6.846 6.68 6.516 6.355 6.196 6.04 5.887 5.736 5.589 5.444 5.302 5.163 5.027 4.894 4.763 4.636 4.511 4.39 4.271 4.155 4.042 3.931 3.824 3.719 3.616 3.516 3.419 3.324 3.232 3.142 3.054 2.969 2.886 2.805 2.726 2.65 2.575 2.503 2.432 2.363 2.297 2.232 2.169 2.107 2.047 1.989 1.933 1.878 1.825 1.773 1.722 1.673 1.626 1.579 1.534 1.491 1.448 1.407 1.367 1.327 1.29 1.253 1.217 1.182 1.148 1.115 1.084 1.053 1.022 0.993 0.965 0.937 0.91 0.884 0.859 0.834 0.81 0.787 0.765 0.743 0.721

</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="11.2" PeakHeight="443.544" Num="5" zHalfNm="372.035" Error="2.17">
-229.244 -4.467 5.074 -2.114 0.884
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="103.677" Depth="0.154"/>
<TopsideChapman PeakHeight="443.544" PeakDensity="1556327.5" PeakScaleHeight="53.642" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
